Home
Class 12
PHYSICS
A giant telescope in an observatory has ...

A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length `1.0 cm`. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is `3.5 xx 10^(6)m`. and the radius of the lunar orbit round the earth is `3.8 xx 10^(8) m`.

A

10 cm

B

12.5 cm

C

15 cm

D

17.5 cm

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

A gaint refrecting telescope at an observatory has an objective lens of focal length 15 m . If an eye piece lens of focal length 1 cm is used, find the angular magnification of the telescope. If this telescope is used to view the moon, what is the diameter of image of moon formed by objective lens ? The diameter of the moon is 3.42 xx 10^6 m and radius of lunar orbit is 3.8 xx 10^8 m .

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Then

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 angular magnification of the telescope ?

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 angular magnification of the telescope ?

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm .Then the magnification

Find the diameter of the image of the moon formed by a spherical concave mirror of focal length 7.6 m. The diameter of the moon is 3450 km and the distance of the earth and the moon is 3.8 xx 10^5 km.

A telescope has an objective lens of focal length 200cm and an eye piece with focal length 2cm . If this telescope is used to see a 50 meter tall building at a distance of 2km, what is the height of the image of the building formed by the objective lens?

A telescope has an objective of focal length 100 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope when it is in normal adjustment?

A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 6.0 cm. The magnifying power of the telescope for distinct vision adjustment is:

A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 6.0 cm. The magnifying power of the telescope for distinct vision adjustment is: