[" 24.A telescope consists of two lenses of focal lengths "],[20cm" and "5cm" .Obtain its magnifying power "],[" when final image.is "(i)" at infinity (ii) at "25cm],[" from the eye."]

A telescope consists of two lenses of focal lengths 20 cm and 5 cm . Obtain its magnifying power when final image is (i) at infinity (ii) at 25 cm from the eye.

A telescope has objective and eyepiece lenses of focal lengths 150 cm and 5 cm, respectively. Calculate the magnifying power of telescope when the final image is formed (a) at infinity and (b) at the least distance of clear vision.

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.

A telescope consists of two lenses of focal lengths 10cm and 1cm . Calculate the length of the telescope, when an object is kept at a distance of 60cm from the objective, and the final image is formed at least distance of distinct vision.

How would you combine two lenses of focal lengths 25 cm and 2.5 cm to make a telescope ? What is the magnifying power of this telescope ?

How would you combine two lenses of focal lengths 25 cm and 2.5 cm to make a telescope ? What is the magnifying power of this telescope ?