Question

draw a labelled ray diagram of astronomical telescope in the normal adjustment position and write the expression for its magnifying power and an astronomical telescope used and objective lens of focal length 15 and Eyes lens of focal length 1 cm what is the angular magnification of the telescope telescope is used to you more what is the diameter of the image of moon formed by the objective lens​

Answer 1

ANSWER

Ray diagram of the image formed at infinity by refracting telescope is shown here which indicates that focal length of objective lens and that of eye piece is f

o

and f

e

respectively.

Magnifying power of telescope is defined as the ratio of angle subtended by image on eye (β) to angle subtended by object on eye (α)

Explanation:

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