Assertion : The resolving power of a telescope is more if the diameter of the objective lens is more.
Directions : Each of these questions contains two statements Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct.
Assertion : The 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.
2 Answers
The correct option is (a).
Explanation:
Resolving power of telescope = D/1.22λ
where D is the diameter of the objective lens and λ is the wavelength of the light used.
With increase in D, resolving power of telescope increases.