Optics Question 424

Question: The resolving power of a telescope whose lens has a diameter of 1.22 m for a wavelength of 5000 Å is

[Kerala PMT 2002]

Options:

A) $ 2\times 10^{5} $

B) $ 2\times 10^{6} $

C) $ 2\times 10^{2} $

D) $ 2\times 10^{4} $

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Answer:

Correct Answer: B

Solution:

Resolving power $ =\frac{d}{1.22\ \lambda }=\frac{1.22}{1.22\times 5000\times {{10}^{-10}}}=2\times 10^{6} $



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