The contents of this presentation includes the history of telescope, types of telescopes: its definition, diagrams, uses, advantages and disadvantages.
in this presentation analyzing optical telescope and type of lens then lens telescope compared newton telescope in university of sulaimani. tell me for other description.
in this presentation analyzing optical telescope and type of lens then lens telescope compared newton telescope in university of sulaimani. tell me for other description.
The present is on Instrumentation of various microscopes such as compound microscope, stereo microscope, polarized microscope, comparison microscope, fluorescent microscope, dark field microscope, electron microscope and it also discusses about the forensic applications of each microscope briefly.
this presentation will hepl you in studying and reviewing to cope up with your lessons. Because mirrors reflect light, they create an illusion of open space by doubling whatever is in a room. Interior decorators use mirrors to make rooms feel larger and more inviting than they truly may be. Certain styles of mirrors may give a room a certain atmosphere based on their appearance. Additionally, decorators may use lenses to reflect light or add color. They may place candles on mirrors to magnify the shimmering effect or use a series of prisms to create rainbows in a white room.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
3. The Telescope (definition)
• It is an instrument which helps the human
eye see objects not ordinarily
visible
• It also increases the size
of an object’s image on
the retina.
4. Two Basic Parts of Optical Telescopes:
1. – a very large
lens that collects a large amount of light from
a far away object.
This forms the object’s first
real, inverted and diminished image.
5. 2. – it has a
short focal length. It acts like a magnifying
lens for the image cast by the objective lens.
It forms the final virtual,
enlarged image of the object.
6. • A lens is a curved piece of glass or other
transparent material that is used to refract light.
• A convex lens is
thicker in the center
than at the edges.
• A concave lens is
thinner in the center
than at the edges.
8. • The simplest type of telescope. It consist of a two-
lens eyepiece at one end of a long tube and a large
convex objective lens at the other end.
• Light enters through a main
objective lens at one end (1).
• The lens refracts (or bends) the
light to a point called focus (2).
• This is then magnified to form an
image by the eyepiece at the
other end (3).
9. Refracting Telescope
The following figure illustrates the use of
a lens to gather and focus light, and the
use of two lenses to make a simple
refracting telescope.
10.
11. Disadvantages:
• They can be heavy because of
their need for large lenses.
• They can also have a large
body which may impact on
transportation and storage.
• They may also be expensive,
as large high quality lenses are
more costly to produce.
Advantages:
• Generally easy to use
• More reliable as their
optics are permanently
fixed and aligned.
12. •
• Many large astronomical
• telescopes use concave mirrors
• instead of objective lenses.
14. A reflecting telescope is similar to a refracting
telescope, but just a little bit more complex. It is called
a reflecting telescope because it uses mirror to reflect
the light internally, into the eyepiece.
• Light enters at (1).
• It is then reflected by a concave
shaped primary mirror at the
other end (2) towards a smaller
mirror known as the secondary
mirror.
• This mirror reflects (3) the light
into the eyepiece, which is
usually mounted on the side of
the telescope (4).
15. Reflecting Telescope
The following figure illustrates the
principle of reflection. The right side of
the figure illustrates the use of a mirror
to make a reflecting telescope.
16. Advantages:
• Fairly compact and portable
• Generally more affordable
too.
• The mirrors inside can
typically produce less
optical aberrations than
lenses of the same value.
Disadvantages:
Mirrors need regular re-aligning as they
can easily slip out of alignment due to
knocks and bumps or even temperature
changes. In some cases, they can also be
susceptible to spherical aberrations.
17. • The Catadioptric could be considered a hybrid
refracting/reflecting telescope, in that it uses both
mirrors and lenses to form the image you see.
• Light enters at one end through a correcting
lens, which help reduce aberrations (1).
• It is then reflected by the primary mirror (2)
at the other end back towards the secondary
mirror mounted in the center of the
corrective lens.
• Here it is reflected (3) back towards a hole in
the primary mirror and into the eyepiece (4)
• When focusing, it is the primary mirror that is
moved, not the eyepiece.
18. Disadvantages:
They may suffer a slight loss of light
because of the positioning of the
secondary mirror.
Also catadioptrics may suffer from
image shift, or a jump in focus, due to
the primary mirror being moved when
focusing.
Advantages:
• Extremely compact and
portable.
• The optics provide the
advantages of both
lenses and mirrors, so
they make a great all
purpose telescope.
19. It can also be from atomic and
subatomic particles which we
called RADIATIONS.
20. What kind of telescope is invented to
detect this radiations?
21. Instrument that
is used to detect
radio waves and
obtain numerous
information
about the space
beyond.
22. • A radio telescope consist of a parabolic (disk-
shaped) mirror that reflects radio waves to a
preamplifier. The preamplifier converts the
waves into electronic impulses, which are then
fed into an electronic mixer that reconverts
the electronic signals and visual images.
23. Generalizations:
• How do scientist gather information from the
space beyond the solar system?
• How do refracting and reflecting telescopes
form images of distant objects?
• What does a radio telescope do?
24. Tell whether the following statements are TRUE or FALSE.
1. An optical telescope is used to magnify the image of a
distant object to make it look closer.
2. A refracting telescope is an optical telescope that
uses a mirror to collect light.
3. An optical telescope collects light waves while a radio
telescope collects radio waves.
4. Convex lenses are used in a reflecting telescope.
5. A concave lens can produce only virtual images
because parallel light rays passing through the lens
never meet.
25. B. Arrange the jumbled letters in order to find the
answer in the following questions/ statements.
SHPLREIPEY 1. A Dutch optician who invented a “spy glass” which is then
renowned as telescope.
EBJOVICET SELN 2. A very large lens that collects a large amount of light from a
far away object.
COFSU 3. It is the point where the lens in a refracting telescope refracts
(or bends) the light.
IDORA SLECOTEPE 4. Instrument that is used to detect radio waves and obtain
numerous information about the space beyond.
EEECYPEI 5. It forms the final virtual, enlarged image of the object.
26. • Explain how a refracting telescope forms a
magnified image of a distant object.
• Describe a reflecting telescope.
• What are stars?
• Why do stars twinkle?
Editor's Notes
As light rays parallel to the optical axis pass through a convex lens, they are bent toward the center of the lens. The rays meet at the focal point of the lens and continue to travel beyond. The more curved the lens, the more it refracts light. A convex lens acts somewhat like a concave mirror, because it focuses rays of light
When light rays traveling parallel to the optical axis pass through a concave lens, they bend away from the optical axis and never meet.
A concave lens can produce only virtual images because parallel light rays passing through the lens never meet.
As light rays parallel to the optical axis pass through a convex lens, they are bent toward the center of the lens. The rays meet at the focal point of the lens and continue to travel beyond. The more curved the lens, the more it refracts light. A convex lens acts somewhat like a concave mirror, because it focuses rays of light.