Light enables us to see by allowing light rays from luminous objects like the sun to reflect off non-luminous objects into our eyes. Light travels in straight lines called rays. When light rays strike a surface, some of the rays are reflected. The angle of incidence, or the angle between the incident ray and a line perpendicular to the surface called the normal, is equal to the angle of reflection, or the angle between the reflected ray and the normal. Mirrors form virtual upright images that undergo lateral inversion and are the same distance from the mirror as the original object. Ray diagrams can be used to illustrate the reflection of light rays off a plane mirror into the eye.
In this power point presentation, we discuss about the light, the laws of reflection, how we are able to see things, about human eye and how human vision works. We also talk about application of reflection of light by discussing about periscope and kaleidoscope.
Light prepared by Yasir Khan.
Topic covered :- reflection, laws of reflection, types of images, refraction, multiple images, kaleidoscope, dispersion of light, human eye, defects of vision, cataract, care for eye.
Thank you.
Uauauajaj I think I need to get you now I think 💞 I can help you out ❤️ I will let sisiisisisisissi the same time different than the other gc's I think 🤔🤔🤔🧐 the same time to go to the said meeting tomorrow at all times and I can get it to me on Monday ni sir kim I will get you some programs in the us that we can go for the next two weeks now I have a few extra hours of sleep and I have some stuff and then I mention that I can do to the body is a little bit of the Filipino people are going to be able it to the office 😜🙂🙂🙂🙂🙂 the morning I have some programs in the us that we are in our prayers I can
Slide that I created to support teaching science to my lower secondary student (Grade 7). The topic is Ray Model of Light. Some contents (pics and videos) are not mine. Hope it is useful for all teacher around the globe.
In this power point presentation, we discuss about the light, the laws of reflection, how we are able to see things, about human eye and how human vision works. We also talk about application of reflection of light by discussing about periscope and kaleidoscope.
Light prepared by Yasir Khan.
Topic covered :- reflection, laws of reflection, types of images, refraction, multiple images, kaleidoscope, dispersion of light, human eye, defects of vision, cataract, care for eye.
Thank you.
Uauauajaj I think I need to get you now I think 💞 I can help you out ❤️ I will let sisiisisisisissi the same time different than the other gc's I think 🤔🤔🤔🧐 the same time to go to the said meeting tomorrow at all times and I can get it to me on Monday ni sir kim I will get you some programs in the us that we can go for the next two weeks now I have a few extra hours of sleep and I have some stuff and then I mention that I can do to the body is a little bit of the Filipino people are going to be able it to the office 😜🙂🙂🙂🙂🙂 the morning I have some programs in the us that we are in our prayers I can
Slide that I created to support teaching science to my lower secondary student (Grade 7). The topic is Ray Model of Light. Some contents (pics and videos) are not mine. Hope it is useful for all teacher around the globe.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
BLOOD AND BLOOD COMPONENT- introduction to blood physiology
Light i
1. LIGHT! (I)
Introduction:
Hey everyone! How are you? Hope you are all good. Today we are going to study an important topic and that is light.
Okay so we are all familiar with what light is, it enables us to see things. Without it, the world would be filled with
darkness and we would be blind!
Light:
As we just discussed, light is a form of energy which enables us too see. Light travels in straight lines, these lines are
called light rays. A bundle of light rays forms a beam of light.
We talked about light as it enables us to see things, how does this happen. There are basically luminous and non-
luminous objects. Those objects which give out their own light are luminous objects, such as Sun, bulb etc. While
those objects which do not give off light are non-luminous such as anything, lets say your hands or a picture. We can
only see these objects if there is a light source (luminous object) available.
If we are saying that light enables us to see, how is that? We are able to see when light rays enter our eyes after they
are reflected from non-luminous objects. Reflection of light is an important characteristic of it.
Reflection of Light:
To describe the terms in the diagram above, here it goes:
● The ray of light which strikes the surface is called the incident ray.
● The ray of light which leaves the surface is called the reflected ray.
● A line perpendicular to the surface is imagined at the point of reflection. This line is called a normal. In this
context the word normal means perpendicular. In the above diagram the normal is colored blue.
● The angle between the incident ray and the normal is called the angle of incidence, or the incident angle.
● The angle between the reflected ray and the normal is called the angle of reflection, or the reflected angle.
Notice that the angle of incidence is equal to the angle of reflection.
Laws of Reflection:
This is just a brief summary of what we have already learned.
● Angle of incidence is equal to the angle of reflection
2. ● Incident ray, reflected ray and normal lie in the same plane.
As shown above, the man and the ball are reflected in the mirror. The image formed in the mirror has certain
characteristics:
● it is of the same size as the object
● it undergoes lateral inversion (your left arm will be your right arm in the reflected image)
● it is upright
● it is virtual as it is not formed on a screen
● the distance of the image from the mirror is equal to the distance of the object from the mirror
We have all probably noticed these things in our daily lives, after all we stand in front of the mirror everyday!
Now, how to draw the ray diagram for the reflection of objects in plane mirror.
It’s easy, let’s get started!
Now here’s the arrow which we have to reflect in the mirror. How will the eye view the image? Only if the reflected
light ray enters the eye.
Firstly, draw the arrow in the mirror (on the opposite side of mirror line). Where should it be? We have just learned
that the reflected image is the same distance from the mirror as the object is from the mirror. So now draw the arrow
like this:
Secondly, join one end of the image to the eye.
3. Remember to draw the arrow head in the right direction. The light ray is going into the eye, so the arrow will be
toward eye.
Now, the point where the joined line cuts the mirror, draw the line from the extreme till there.
Repeat it with the other extreme end of the arrow.
Now, the lines in blue are incident rays while those in red are reflected ones.