Optics Question 371
Question: Wavelength of light used in an optical instrument are $ {\lambda _{1}}=4000 $ Å and $ {\lambda _{2}}=5000 $ Å, then ratio of their respective resolving power (corresponding to $ {\lambda _{1}} $ and $ {\lambda _{2}}) $ is
[AIEEE 2002]
Options:
A) 16 : 25
B) 9 : 1
C) 4 : 5
D) 5 : 4
Show Answer
Answer:
Correct Answer: D
Solution:
R.P. $ \propto \frac{1}{\lambda }\Rightarrow \frac{{{(R.P.)} _{1}}}{{{(R.P.)} _{2}}}=\frac{{\lambda _{2}}}{{\lambda _{1}}}=\frac{5}{4} $
