Optics Question 436
Question: The diameter of objective of a telescope is 1m. Its resolving limit for the light of wave length 4538 Å, will be
[Pb. PET 2003]
Options:
A) $ 5.54\times {{10}^{-7}}rad $
B) $ 2.54\times {{10}^{-4}}rad $
C) $ 6.54\times {{10}^{-7}}rad $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
Resolving limit $ d\theta =\frac{1.22\lambda }{a}=\frac{1.22\times 4538\times {{10}^{-10}}}{1} $
$ =5.54\times {{10}^{-7}}rad $ .
