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Question

Assertion : Resolving power of a telescope is more if the diameter of the objective lens is more.
Reason : Objective lens of large diameter collects more light

A
Both Assertion and Reason are correct and Reason is correct explanation of Assertion
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B
Assertion and Reason both are correct but Reason is not correct explanation of Assertion.
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C
Assertion is true but Reason is false.
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D
Both Assertion and Reason are false.
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Solution

The correct option is C Assertion and Reason both are correct but Reason is not correct explanation of Assertion.
Resolving power of a telescope is more if the diameter of the objective lens is more because R=a1.22λ
where, a is diameter of the objective. objective lens of large diameter collects more light but does not increase the resolving power of the telescope because resolving power increases when angular separation increases.

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