A telescope has an objective of focal length `50cm` and an eyepiece of focal length `5cm.` The least distance of distinct vision is `25cm.` The telescope is focused for distinct vision on a scale `2m` away from the objective. Calculate (a) magnification produced and (b) separation between objective and eyepiece.

A telescope has an objective of focal length 50 cm and an eye-piece of focal length 5 cm. The least distance of distinct vision is 25 cm. The telescope is focused for distinct vision on a scale 2 m away from the objective. Calculate (i) magnification produced and (ii) separation between objective and eyepiece.

A telescope has an objective of focal length 50 cm and eye piece of focal length 5 cm . The least distance of distinct vision is 25 cm . The telescope is focussed for distinct vision on a scale 200 cm away from the objective. Calculate (i) the separation between objective and eye piece (ii) the magnification produced.

A telescope has an objective of focal length 100 cm and eye piece of focal length 6 cm and the least distance of distinct vision is 25 cm. The telescope is focused for distinct vision of an object at a distance 100 m from the objective. What is the distance of separation between objective and eye piece?

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

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

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 telescope has an objective of focal length 100 cm and an eyepiece of focal length 5 cm. What is the magnifying power of the telescope when the final image is formed at the least distance of distinct vision ?

An astronomical telescope has an objective of focal length 100 cm and an eye piece of focal length 5 cm. The final image of a star is seen 25 cm from the eyepiece. The magnifying power of the telescope is