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

Answer 1

Answer: (B)

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 $R=\frac{a}{1.22\lambda }$
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.