Is time travel possible?
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The document discusses three physical models that attempt to explain time travel: classical mechanics, relativistic mechanics, and quantum mechanics. It describes Einstein's theory of relativity which adds time as a fourth dimension and shows how time is relative to velocity and acceleration. The document also considers whether time travel is possible based on theories of gravity affecting the flow of time and the twin paradox, but concludes it is unclear if traveling back in time could be achieved.
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Time Travel: A Science Fiction or A Science Fact?
A Presentation slide based upon Time Travelling.
Theory of Relativity, Forward & Backward Time Travel, Grandfather Paradoxes described
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Time travel involves moving between different points in time, either backwards or forwards. While forward time travel is possible due to time dilation from relativity, traveling back in time is currently unknown if possible under the laws of physics. Einstein's theories of special and general relativity provide a framework for time travel possibilities, but also introduce paradoxes like changing the past. Theories involving wormholes or parallel universes have been proposed as potential ways to circumvent these paradoxes by traveling between different times or histories.
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The document discusses various theoretical time machines that could be constructed based on solutions to Einstein's field equations, including rotating cylinders, wormholes, and ring lasers, but notes that most proposals are mathematically possible but physically improbable due to involving unphysical objects or violating causality.
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This document discusses Einstein's theories of special and general relativity and how they relate to the concepts of time dilation, length contraction, and potential methods for time travel. It provides explanations of key ideas in relativity such as how mass curves spacetime according to general relativity and how the laws of physics are the same in any inertial frame under special relativity. Several hypothetical methods for time travel are also presented, including cosmic strings, wormholes, Hawking's train, and an Alcubierre drive.
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This document discusses the concept of time travel through various theories and possibilities. It explains that according to Einstein's theory of relativity, time is relative and can vary for different observers depending on speed. The document then outlines various hypothesized methods for time travel, such as wormholes, black holes, and time machines. It provides brief descriptions of wormholes and black holes as potential means for time travel. The document also discusses how time dilation effects from traveling close to the speed of light could allow for time travel into the future.
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Theory of Relativity, Forward & Backward Time Travel, Grandfather Paradoxes described
Time travel
Time travel involves moving between different points in time, either backwards or forwards. While forward time travel is possible due to time dilation from relativity, traveling back in time is currently unknown if possible under the laws of physics. Einstein's theories of special and general relativity provide a framework for time travel possibilities, but also introduce paradoxes like changing the past. Theories involving wormholes or parallel universes have been proposed as potential ways to circumvent these paradoxes by traveling between different times or histories.
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This is about TIME TRAVEL...........
In this presentation I try to give best knowledge about the time travel if you want to learn about this plz view ..........
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The document discusses various theoretical time machines that could be constructed based on solutions to Einstein's field equations, including rotating cylinders, wormholes, and ring lasers, but notes that most proposals are mathematically possible but physically improbable due to involving unphysical objects or violating causality.
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Introduction
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This document discusses Einstein's theories of special and general relativity and how they relate to the concepts of time dilation, length contraction, and potential methods for time travel. It provides explanations of key ideas in relativity such as how mass curves spacetime according to general relativity and how the laws of physics are the same in any inertial frame under special relativity. Several hypothetical methods for time travel are also presented, including cosmic strings, wormholes, Hawking's train, and an Alcubierre drive.
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Presentation On time Travel By Muhammad Zaroon (University Of Central Punjab - Lahore).
Mechanical Engineering Department.
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This document discusses the concept of time travel through various theories and possibilities. It explains that according to Einstein's theory of relativity, time is relative and can vary for different observers depending on speed. The document then outlines various hypothesized methods for time travel, such as wormholes, black holes, and time machines. It provides brief descriptions of wormholes and black holes as potential means for time travel. The document also discusses how time dilation effects from traveling close to the speed of light could allow for time travel into the future.
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Time travel
Time travel refers to the concept of moving between different points in time, often using a hypothetical time machine. Some theories like relativity suggest time travel may be possible, but it introduces issues like changing the past (the grandfather paradox). While not proven impossible, most scientists are skeptical time travel could occur without resolving these paradoxes. The absence of visitors from the future is a common argument against time travel being possible.
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This is a presentation on the time travel.Many of us don't know about time travel, so here you can find the complete information regarding the time travel.
If you guys have any doubts then feel free to ask me in the comments section.
THANK YOU!!!!
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1) The document discusses different theories and concepts related to time travel, including forward and backward time travel in fiction and potential scientific explanations.
2) It examines ideas like time dilation, wormholes, closed timelike curves, and paradoxes (like killing your grandfather) that could result from time travel.
3) Theories around immutable and mutable timelines are presented, exploring how time travel could allow changing or not changing the past within the framework of different models.
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This document discusses the concept of time travel through both science fiction and theoretical physics. It defines time travel as movement between points in time, potentially using a hypothetical time machine. While one-way travel into the future via time dilation has been proven, traveling to the past faces challenges like paradoxes. The document reviews the history of time travel in fiction and explores theoretical physics concepts like wormholes, cosmic strings, and faster-than-light travel that could potentially allow for time travel. It also addresses paradoxes like the grandfather paradox.
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Wormholes are hypothetical shortcuts through space-time that could allow travel between distant regions. Theoretically, wormholes could enable travel to the future or past faster than normal space-time. While mathematically valid, no observational evidence of wormholes currently exists. Traversable wormholes that could be safely traveled through would need to obey Einstein's field equations, connect two asymptotically flat regions, lack horizons, have bearable tidal forces, and allow finite-time traversal. Hyperspace refers to dimensions beyond the normal three spatial dimensions, with the possibility that lifeforms from higher dimensions could exist unobserved above our own.
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The document discusses various concepts and theories related to time travel. It begins by defining time travel as moving between different points in time analogous to moving between different points in space, potentially using a time machine. It then discusses Einstein's theories of special and general relativity which established that time is relative and affected by speed and gravity. The document considers some potential ways to achieve time travel, such as moving faster than light, traveling through wormholes or black holes, but also notes significant challenges like paradoxes. It provides examples of depictions of time travel in science fiction films to help explain these complex theoretical physics concepts.
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Time travel
Time travel into the past presents several theoretical possibilities and paradoxes according to our current understanding of physics:
1) Gravitational time dilation near massive objects like black holes could allow travel into the future by experiencing slowed time.
2) Hypothetical phenomena like wormholes, cosmic strings, and Kerr black holes could warp spacetime in a way that allows travel into the past, but they have not been proven to exist.
3) The grandfather paradox illustrates that traveling back in time could create inconsistent causal loops that violate causality. Most time travel models seek to avoid such paradoxes.
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- Einstein first proposed the concept of wormholes in 1935 as bridges connecting different points in spacetime. However, it was later shown that these bridges would be unstable without exotic matter that violates the null energy condition.
- In 1987, Morris and Thorne introduced the concept of traversable wormholes that could theoretically allow travel between different points in the universe if stabilized by exotic matter at the wormhole throat. They provided a simplified theoretical framework and stress-energy scenario for analyzing traversable wormholes.
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a detail presentation on one of the most debated topics ever...The presentation features Einsteins,Stephen Hawkings views on time travel. possibilities and ways through travel through time are discussed in the presentation
Time travel
Time travel refers to the concept of moving between different points in time, often using a hypothetical time machine. Some theories like relativity suggest time travel may be possible, but it introduces issues like changing the past (the grandfather paradox). While not proven impossible, most scientists are skeptical time travel could occur without resolving these paradoxes. The absence of visitors from the future is a common argument against time travel being possible.
Time travel
Hi guys!!!
This is a presentation on the time travel.Many of us don't know about time travel, so here you can find the complete information regarding the time travel.
If you guys have any doubts then feel free to ask me in the comments section.
THANK YOU!!!!
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1) The document discusses different theories and concepts related to time travel, including forward and backward time travel in fiction and potential scientific explanations.
2) It examines ideas like time dilation, wormholes, closed timelike curves, and paradoxes (like killing your grandfather) that could result from time travel.
3) Theories around immutable and mutable timelines are presented, exploring how time travel could allow changing or not changing the past within the framework of different models.
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This document discusses the concept of time travel through both science fiction and theoretical physics. It defines time travel as movement between points in time, potentially using a hypothetical time machine. While one-way travel into the future via time dilation has been proven, traveling to the past faces challenges like paradoxes. The document reviews the history of time travel in fiction and explores theoretical physics concepts like wormholes, cosmic strings, and faster-than-light travel that could potentially allow for time travel. It also addresses paradoxes like the grandfather paradox.
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Wormholes are hypothetical shortcuts through space-time that could allow travel between distant regions. Theoretically, wormholes could enable travel to the future or past faster than normal space-time. While mathematically valid, no observational evidence of wormholes currently exists. Traversable wormholes that could be safely traveled through would need to obey Einstein's field equations, connect two asymptotically flat regions, lack horizons, have bearable tidal forces, and allow finite-time traversal. Hyperspace refers to dimensions beyond the normal three spatial dimensions, with the possibility that lifeforms from higher dimensions could exist unobserved above our own.
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The document discusses various concepts and theories related to time travel. It begins by defining time travel as moving between different points in time analogous to moving between different points in space, potentially using a time machine. It then discusses Einstein's theories of special and general relativity which established that time is relative and affected by speed and gravity. The document considers some potential ways to achieve time travel, such as moving faster than light, traveling through wormholes or black holes, but also notes significant challenges like paradoxes. It provides examples of depictions of time travel in science fiction films to help explain these complex theoretical physics concepts.
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This is a presentation on time travelling, here i mainly focused on main sub topics to understand the concept of time travelling, i.e.
1) Parallel Space
2) Paradox
3) How to travel through time
4) Evidence
Time travel
Time travel into the past presents several theoretical possibilities and paradoxes according to our current understanding of physics:
1) Gravitational time dilation near massive objects like black holes could allow travel into the future by experiencing slowed time.
2) Hypothetical phenomena like wormholes, cosmic strings, and Kerr black holes could warp spacetime in a way that allows travel into the past, but they have not been proven to exist.
3) The grandfather paradox illustrates that traveling back in time could create inconsistent causal loops that violate causality. Most time travel models seek to avoid such paradoxes.
Einstein theory of time travel
This document discusses several theories of time travel, including Einstein's equations allowing for time travel under certain configurations of matter and energy, Gödel's mathematical solutions showing time travel is possible if the universe rotates, and Kip Thorne's work developing a serious proposal for a time machine using wormholes. While time travel remains theoretically possible, significant technological limitations exist, such as a lack of means to generate the exotic matter needed to stabilize wormholes. Paradoxes also pose challenges to changing the past through time travel.
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- Wormholes are hypothetical topological features of spacetime that act as shortcuts through space and time, connecting two regions. They consist of two mouths connected by a throat.
- Einstein first proposed the concept of wormholes in 1935 as bridges connecting different points in spacetime. However, it was later shown that these bridges would be unstable without exotic matter that violates the null energy condition.
- In 1987, Morris and Thorne introduced the concept of traversable wormholes that could theoretically allow travel between different points in the universe if stabilized by exotic matter at the wormhole throat. They provided a simplified theoretical framework and stress-energy scenario for analyzing traversable wormholes.
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Albert Einstein's theory of relativity established that space and time are interwoven into a single continuum known as spacetime. A wormhole is a hypothetical topological feature of spacetime that acts as a shortcut between two distant regions, allowing travel through the wormhole that would be faster than traveling the same distance normally. Traveling through a wormhole involves passing through a throat that connects the two mouths of the wormhole. While theoretically possible according to general relativity, wormholes would require exotic matter that violates the null energy condition to be stabilized and traversable. Current research focuses on stabilizing wormholes and minimizing the amount of exotic matter needed.
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1. Newton conceived of space and time as absolute and unaffected by events within them. Einstein later developed the theory of relativity which holds that space and time are relative and can be affected by motion and gravity.
2. According to Einstein, the speed of light is constant for all observers, and time and length can change relative to the observer's frame of reference and motion.
3. General relativity explains gravity as a curvature of spacetime caused by mass and energy, and predicts effects like gravitational time dilation near massive objects.
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3) Experimental evidence that supports relativity includes time dilation of particles, length contraction observed in the lunar orbit, and Einstein's famous equation E=mc^2 being verified by numerous experiments.
14_special_rel.ppt
1) This document covers the key concepts of special relativity, including that the speed of light is constant for all observers, leading to the idea that space and time are relative rather than absolute.
2) It discusses how different observers in relative motion will measure different distances and times for the same events.
3) The Lorentz transformations provide the equations to relate measurements between different reference frames in motion relative to each other.
Unit1_Prerequisites.pdf
Quantum physics arose to explain phenomena that classical physics could not, such as:
1. The spectrum of blackbody radiation, explained by Planck's hypothesis that energy is quantized.
2. The photoelectric effect, where Einstein proposed light is made of discrete quanta called photons.
3. The stability of atoms, resolved by Bohr's model where electrons can only orbit in discrete energy levels.
Classical physics made incorrect predictions for these phenomena, failing to account for their probabilistic and quantized nature. Quantum theory overthrew classical physics by introducing fundamental principles like the wave-particle duality and the probabilistic nature of measurements.
Day 1 Martin file from syllabus ves 5.pptx
- Ancient astronomers initially constructed a model that placed Earth at the center of the universe, with all other objects orbiting around it. This was known as the geocentric model.
- Over time, as better instruments allowed for more detailed observations, this model could no longer explain all the observed facts about planetary motion.
- A new heliocentric model, placing the Sun at the center, was proposed and eventually accepted because it fit the experimental evidence better. This shows how scientific models evolve as new evidence is obtained through observation.
Modern phyiscs lecture 1
This document provides an overview of modern physics concepts covered in a 1EE modern physics course, including special relativity. It discusses how classical physics concepts of space, time, and velocity were found to be inconsistent with experimental results. The document uses examples such as particle lifetime experiments and velocity addition to show how observations cannot be explained unless space and time are treated as relative and velocities are limited to the speed of light. The principles of relativity were developed by Einstein to resolve these inconsistencies and form the foundations of modern physics.
Special and General theory of Relativity Einstein
This document summarizes key concepts from Einstein's special and general theories of relativity presented in a seminar. It discusses that all physical laws are independent of reference frame and the speed of light is constant. It also covers time dilation, length contraction, relativity of simultaneity, and the twin paradox from special relativity. For general relativity, it describes gravity as the warping of spacetime, the equivalence principle, gravitational time dilation, bending of light by gravity, gravitational redshift, black holes, and experimental tests supporting the theories.
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PHYSICS INVESTIGATORY PROJECT ON THEORY OF RELATIVITY HYPOTHESIS AND CONCLUSIONS FOR CLASS 12 CBSE PHYSICS(GENERAL AND SPECIAL)
Theory of Relativity.pptx
The theory of relativity has several key points:
1. Time passes differently for observers moving at different speeds, such that a year for a fast-moving observer could be 1000 years on Earth.
2. The speed of light is a constant for all observers, regardless of their own speed.
3. Einstein used thought experiments and Pythagorean theorem to show that time must pass differently for observers in relative motion in order to keep the speed of light constant.
4. The theory of relativity has been proven through experiments and is crucial for applications like space missions and GPS technology.
Time Concept
1) General relativity holds that space and time are curved by mass and energy, rather than being absolute. Objects follow straight paths through curved spacetime.
2) Time appears to slow near massive objects like the Earth due to gravitational time dilation. This effect has been confirmed by precise clock experiments.
3) Hypothetical phenomena like wormholes, rotating black holes, and cosmic strings could generate enough gravitational force to enable time travel, though such phenomena have not been proven to exist. Any such time travel poses paradoxes that may require theories like parallel universes.
Sincronizziamo gli orologi
1. Isaac Newton conceived of time as absolute and flowing uniformly, an idea that was later disproven by Einstein's theory of relativity.
2. Einstein's special theory of relativity established that the laws of physics are the same in all inertial frames of reference and that the speed of light is constant, independent of the motion of the observer.
3. As a result of Einstein's theory, time is shown to flow at different rates for observers in different reference frames, as demonstrated by the fact that clocks moving at high speeds are measured to tick slower than identical clocks at rest.
Big bang theory presentation (PPt) 2018 Hemant pratap singh
Big bang theory presentation created by Hemant pratap singh in technical seminar 2018 in Vision institute of technology Aligarh
Science Presentation on Motion
The document is a science project on the topic of motion. It contains sections that define and describe different types of motion including: laws of motion, imperceptible human motions, motion of celestial bodies like the universe, galaxy, sun and solar system, earth, continents and internal human body parts. It also discusses motion at microscopic levels like cells, particles and subatomic particles. Other types of motion defined include harmonic motion, periodic motion, rectilinear motion, random motion, circular motion, rotational motion, oscillatory motion and projectile motion. The document was created by Bhumika Singh, a 9th grade science student.
Gravitation (Class XI Brief)
Gravitation has been the most common phenomenon in our lives but somewhere down the line we don't know musch about it. So here is a presentation whic will help you out to know what it is !! I'll be makin it available for download once i submit it in school :P :P ! Coz last one of the brats showed the same presentation that i uploade and unfortunatele his roll number fell before mine ! I was damned..:D :D :P
The Theory of Relativity
The document summarizes key concepts from modern physics including relativity and general relativity. It discusses Einstein's special and general theories of relativity, including time dilation, length contraction, and mass-energy equivalence. It also covers general relativity topics such as gravitational waves, black holes, and their applications to cosmology. The presentation aims to grow interest in these historical theories and unlock new understandings of the universe.
Presentation on the theory of relativity
The document summarizes key concepts from modern physics including relativity and general relativity. It discusses Einstein's special and general theories of relativity, including time dilation, length contraction, and mass-energy equivalence. It also covers general relativity topics such as gravitational waves, black holes, and applications to cosmology. The presentation aims to grow interest in these historical topics and unlock new understandings of the universe.
Digamon IT1(DK1) presentation
The document discusses how space and time can be warped based on one's frame of reference and motion. It introduces concepts from special and general relativity such as the constancy of the speed of light, length contraction, time dilation, gravitational lensing, and how matter warps space-time. It also discusses cosmological observations and the expansion of space, providing evidence for the Big Bang theory of an evolving universe that was smaller and denser in the past.
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Cosmic Histories and human perspectives: A journey through time and space
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Equivariant neural networks and representation theory
Or: Beyond linear.
Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
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Thematic analysis in qualitative research is a time-consuming and systematic task, typically done using teams. Team members must ground their activities on common understandings of the major concepts underlying the thematic analysis, and define criteria for its development. However, conceptual misunderstandings, equivocations, and lack of adherence to criteria are challenges to the quality and speed of this process. Given the distributed and uncertain nature of this process, we wondered if the tasks in thematic analysis could be supported by readily available artificial intelligence chatbots. Our early efforts point to potential benefits: not just saving time in the coding process but better adherence to criteria and grounding, by increasing triangulation between humans and artificial intelligence. This tutorial will provide a description and demonstration of the process we followed, as two academic researchers, to develop a custom ChatGPT to assist with qualitative coding in the thematic data analysis process of immersive learning accounts in a survey of the academic literature: QUAL-E Immersive Learning Thematic Analysis Helper. In the hands-on time, participants will try out QUAL-E and develop their ideas for their own qualitative coding ChatGPT. Participants that have the paid ChatGPT Plus subscription can create a draft of their assistants. The organizers will provide course materials and slide deck that participants will be able to utilize to continue development of their custom GPT. The paid subscription to ChatGPT Plus is not required to participate in this workshop, just for trying out personal GPTs during it.
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Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
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photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
bordetella pertussis.................................ppt
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原版制作(carleton毕业证书)卡尔顿大学毕业证硕士文凭原版一模一样
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When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
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Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
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The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
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Is time travel possible?
- 1. IS TIME TRAVEL POSSIBLE?
- 2. THE THREE PHYSICAL MODELS • CLASSICAL MECHANICS It can explain the phenomena occurring in our scale. Isaac Newton
- 3. • RELATIVISTIC MECHANICS Time is not an absolute value, it varies with velocity and acceleration. Used with big masses and velocities near light speed (300 000 km/s). THE THREE PHYSICAL MODELS Albert Einstein
- 4. • QUANTUM MECHANICS Used for very small scales (atoms, photons, electrons, etc.) THE THREE PHYSICAL MODELS Erwin Schrödinger
- 5. RELATIVITY: A WORLD IN 4D • We have a 3D vision of our world. • For us, time is an absolute value. It flows equally for everybody. A 3D axis
- 6. • Relativity adds a new dimension: time • Time depends on velocity and acceleration, higher velocity/acceleration implies slower time. • Space-time “sheet” or net is altered by the gravity of each mass (planets, stars, etc.) RELATIVITY: A WORLD IN 4D Space-time net altered by the gravity of the Earth and the Sun.
- 7. IS IT REALLY POSSIBLE TO TRAVEL IN TIME? • Life expectancy: 79 years old. • Life expectancy at the top of the Empire State (380 meters): 104 microseconds lower. + distance to Earth core = less gravity = time goes faster Empire State Building
- 8. • Twin paradox: IS IT REALLY POSSIBLE TO TRAVEL IN TIME?
- 9. AND WHAT ABOUT TRAVELING BACK IN TIME?