Optics Question 401

Question: The diameter of the objective lens of a telescope is 5.0 m and wavelength of light is 6000 Å. The limit of resolution of this telescope will be

[MP PMT 1994]

Options:

A) 0.03 sec

B) 3.03 sec

C) 0.06 sec

D) 0.15 sec

Show Answer

Answer:

Correct Answer: A

Solution:

Limit of resolution $ =\frac{1.22\ \lambda }{a}\times \frac{180}{\pi } $ (in degree) $ ={{( \frac{1.22\times (6000\times {{10}^{-10}})}{5}\times \frac{180}{\pi } )}^{o}}=0.03\ sec $



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