A telescope consists of an objective of focal length 150 cm and an eyepiece of focal length 6.0 cm. If the final image is formed at infinity, then calculate :
(I) the length of the tube in this adjustment, and
(II) the magnification produced.

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 telescope consists of an objective of focal length 50 cm and an eyepiece of focal length 5 cm. In normal adjustment of the telescope, what will be (i) the magnifying power and (ii) the length of the telescope.

A telescope has an objective of focal length 200 cm and eyepiece of focal length 5 cm. Calculate its magnifying power when the final image is formed (a) at infinity and (b) at distance of distinct vision.

An astronomicla telescope has an objective of focal length 20 cm and an eyepiece of focal length 4.0 cm. The telescope is focussed to see an object 10 cmfrom the objective.the fnal imae is formed at infinity.Find the length of the tube and the angular magnification produced by the telescope.

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 ?

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?