Home
Class 12
PHYSICS
(a) A giant refracting telescope at an o...

(a) A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0cm is used, what is the angular magnification of the telescope?
(b) If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is `3.48 xx 10^(6)m`, and the radius of lunar orbit is `3.8xx10^(8)m`.

Text Solution

Verified by Experts

(a) Angular magnification = 1500
(b) Diameter of the image = 13.7 cm.
Promotional Banner

Similar Questions

Explore conceptually related problems

A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification of the telescope ?

b) If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens?

A small telescope has an objective lens of focal length 144 cm and an eyepiece of focal length 6.0 cm. What is the magnifying power of the telescope ? What is the separation between the objective and the eyepiece ?

An astronomical telescope of magnifying power 12, has an objective of focal length 1.08 m. The focal length of its eyepiece will be

A small telescope has an objective lens of focal length 140cm and an eyepiece of focal length 5.0cm. What is the magnifying power of the telescope for viewing distant objects when (a) the telescope is in normal adjustment (i.e., when the final image is at infinity)? (b) the final image is formed at the least distance of distinct vision (25cm)?