Question

What is the essential difference between a terrestrial telescope and an astronomical telescope?
A. One of the lenses in a terrestrial telescope is concave.
B. The final image formed in a terrestrial telescope is virtual.
C. A terrestrial telescope forms an erect image while an astronomical telescope forms an inverted image.
D. A terrestrial telescope forms an inverted image while an astronomical telescope forms an erect image.

Answer 1

A terrestrial telescope is a form of refracting telescope that is used to see upright images of distant earthly objects. The primary goal of an astronomy telescope is to make distant objects appear as bright, contrasty, and big as possible. The three basic functions of the camera are light gathering, resolution, and magnification.

Complete step by step answer:
Let us have a look at some differences between a terrestrial telescope and an astronomical telescope in order to choose the correct option from the given alternatives.

Astronomical Telescope	Terrestrial telescope
1. An astronomy telescope is an optical apparatus that magnifies the picture of distant celestial objects such as stars, planets, satellites, and galaxies.	1. A terrestrial telescope, also known as a Galilean telescope, is an optical equipment that is used to magnify the picture of distant objects on Earth.
2. Two convex lenses make up this instrument.	2. It has a concave eyepiece and a convex objective lens.
3. An astronomy telescope's final image is always inverted.	3. The erect image produced by the Galilean telescope is the end result.
4. It has a high magnification power.	4. It has a low magnification power.

Hence, from the above given differences it can be concluded that option C is the correct answer.

Note: With a total length of $980\,mm\left( {3\,ft.3\,inch} \right)$ , Galileo's most powerful telescope magnified objects by about 30 times. The photos were fuzzy and distorted due to defects in the design, such as the lens' shape and small field of view. Despite these faults, Galileo was able to explore the sky with the telescope. He used it to see craters on the Moon, Jupiter's four largest moons, and Venus's phases.