Optics Question 432
Question: The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 Å is of the order
[CBSE PMT 2005]
Options:
A) $ 10^{6}rad $
B) $ {{10}^{-2}}rad $
C) $ {{10}^{-4}}rad $
D) $ {{10}^{-6}}rad $
Show Answer
Answer:
Correct Answer: D
Solution:
Angular resolution $ d\theta =\frac{1.22\lambda }{a} $
$ =\frac{1.22\times 5000\times 10\times {{10}^{-10}}}{10\times {{10}^{-2}}} $
$ =6.1\times {{10}^{-6}}rad $ .
