Optics Question 740
Question: When light is refracted from air into glass
[IIT 1980; CBSE PMT 1992; MP PET 1999;]
Options:
A) Its wavelength and frequency both increase
B) Its wavelength increases but frequency remains unchanged
C) Its wavelength decreases but frequency remains unchanged
D) Its wavelength and frequency both decrease
Show Answer
Answer:
Correct Answer: C
Solution:
$ f\propto \frac{1}{\lambda } $ . As $ {\lambda _{b}}<{\lambda _{g}} $
Therefore $ f _{b}>f _{g} $
