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in Physics by (83.4k points)

Assertion : The focal length of objective lens in telescope is much more than that of eye piece.

Reason : Telescope has high resolving power due to large focal length.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

The correct option is (b).

Explanation:

In telescope to have a large magnifying power, focal length of objective lens is kept large. To increase the magnifying power and resolving power, aperture of the objective lens is made large.

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