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and are focal lengths of objective and eyepiece respectively of the telescope. The angular magnification for the given telescope is equal to

a)

b)

c)

d)


Question ID - 152454 :-

and are focal lengths of objective and eyepiece respectively of the telescope. The angular magnification for the given telescope is equal to

a)

b)

c)

d)

1 Answer
5876 Votes
3537

Answer Key : (a) -

(a)

Magnifying power of a telescope having objective of focal length () and image distance  is

To see with relaxed eye final image should be formed at infinity.

The distance between the objective and eyepiece is so adjusted the image is formed at the focus of the eyepiece.

Substituting  we get



Next Question :

Continuous emission spectrum is produced by

a)

Incandescent electric lamp

b)

Mercury vapour lamp

c)

Sodium vapour lamp

d)

The sun


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