Astronomical telescope is used to observe distant such as planets, stars etc. It consists of two convex lenses placed co-axially such that the focal length of the objective is large compared to the focal length of the eyepiece.
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What is an astronomical telescope?
Definition of astronomical telescope : a telescope that is designed for observing celestial bodies and that requires no image-erecting system — compare terrestrial telescope.
What is the formula of astronomical telescope?
Hint: A telescope is an optical device used to look at distant objects like a star, a planet, or a distant tree etc. The magnification power of this telescope is given as m=−f∘fe . And the length of telescope in normal adjustment i.e., when both object and image are at infinity is given byfu+fe=L .
What are the uses of astronomical telescope?
telescope, device used to form magnified images of distant objects. The telescope is undoubtedly the most important investigative tool in astronomy. It provides a means of collecting and analyzing radiation from celestial objects, even those in the far reaches of the universe.
What is magnifying power of an astronomical telescope Class 12?
The magnifying power of an astronomical telescope in normal adjustment is 100. The distance between the objective and the eyepiece is 101 cm.
What is astronomical telescope Wikipedia?
A telescope is an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.
What is the other name of astronomical telescope?
Also called Kepler telescope.
What type of telescope is an astronomical telescope?
Refracting telescopes use lenses to gather light and focus it to a point. This was the first type of telescope to be invented, in the early 17th century, and was first used for serious astronomy by Galileo, 400 years ago. The images produced are upright, which makes refractors good for ground based observations.
Which lens is used in astronomical telescope?
Convex lens is used as an objective lens of an astronomical telescope. The convex lens used has high focal length.
What is the magnification of astronomical telescope?
The magnification produced by an astronomical telescope for normal adjustment is 10 and the length of the telescope is 11 m.
How many lens does an astronomical telescope have?
The astronomical telescope makes use of two positive lenses: the objective, which forms the image of a distant object at its focal length, and the eyepiece, which acts as a simple magnifier with which to view the image formed by the objective.
What is the magnification of telescope?
Magnification (power): The amount that a telescope enlarges its subject. It’s equal to the telescope’s focal length divided by the eyepiece’s focal length. As a rule of thumb, a telescope’s maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters).
Who invented the first astronomical telescope?
Galileo Galilei (1564-1642) was part of a small group of astronomers who turned telescopes towards the heavens. After hearing about the “Danish perspective glass” in 1609, Galileo constructed his own telescope. He subsequently demonstrated the telescope in Venice.
What are the 4 main types of telescopes?
- Refractor Telescopes.
- Reflector Telescopes.
- Dobsonian Telescopes.
- Maksutov-Cassegrain Telescopes.
What is the difference between astronomical telescope and Galilean telescope?
To reiterate: Telescopes come in two basic flavors—those with a high plus eyepiece lens, and those with a high minus eyepiece lens. High-plus-eyepiece telescopes are called astronomical (or Keplerian) telescopes; and high-minus-eyepiece telescopes are called Galilean (or terrestrial) telescopes.
How do you increase the magnification power of an astronomical telescope?
The magnifying power of an astronomical telescope can be increased if we. Increase the focal length of the objective. Increase the focal length of the eye piece.
How will the magnifying power of a refracting type astronomical telescope?
Answer: (i) As. , so that magnifying decreases when focal length of eye-piece increases.
What is the magnifying power of an astronomical telescope when the final image of the object is formed at least distance of distinct vision?
The magnification produced by an astronomical telescope when the final image is formed at infinity is 10 and the length of the telescope is 1.1 m. The magnification when the final image is formed at least distance of distinct vision is – No worries! We’ve got your back.
What are the two types of telescopes?
There are two basic types of telescopes, refractors and reflectors. The part of the telescope that gathers the light, called the objective, determines the type of telescope.
Who made the first telescope in India?
On October 2, 1608, Hans Lippershey demonstrated a new invention – the first optical refracting telescope. A.S.Ganesh turns his telescope to view back in time…
Which is the largest telescope in India?
The 3.6m Devasthal Optical Telescope is a custom-built instrument of great complexity. This telescope has the distinction of being largest telescope in India for study of celestial objects at optical wavelengths. It is a national facility installed at Devasthal in the district of Nainital, India.
What is the difference between compound microscope and astronomical telescope?
In compound microscope, the aperture of objective lens is smaller than eyepiece, while in telescope the aperture of objective is greater than aperture of eyepiece.
Is astronomical telescope refracting or reflecting?
Hint: Astronomical telescope is refracting type and it makes an inverted image of the distant object. It has spherical and chromatic aberrations. We know that the chromatic aberrations occur in the case of lenses and the mirrors are free from the chromatic aberrations.
Which of the following is correct for astronomical telescope?
In Astronomical telescope, aperture and focal length of objective is large than eye-piece.In Terrestrial telescope, three convex lenses are used and final image is errect.In Galilean telescope, two lenses, one convex (objective) and one concave (eye-piece) are used. All options are correct.
What are the three main components of a telescope?
Answer and Explanation: A reflecting telescope generally consists of a primary mirror, a secondary mirror, and an eyepiece. Different types of reflecting telescopes use different arrangements of these three components and may add other components such as lenses.