Optics Question 433

Question: The resolving power of an astronomical telescope is 0.2 seconds. If the central half portion of the objective lens is covered, the resolving power will be

[MP PMT 2004]

Options:

A) 0.1 sec

B) 0.2 sec

C) 1.0 sec

D) 0.6 sec

Show Answer

Answer:

Correct Answer: A

Solution:

Resolving power $ =\frac{a}{1.22\lambda } $



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