Optics Question 836
Question: When a ray of light enters a glass slab from air,
Options:
A) its wavelength decreases.
B) its wavelength increases.
C) Its frequency decreases.
D) neither its wavelength nor its frequency changes.
Show Answer
Answer:
Correct Answer: A
Solution:
[a] When the ray enters a glass slab from air, its frequency remains unchanged. Since glass slab in an optically denser medium, the velocity of light decreases and therefore we can conclude that the wavelength decreases.
BETA
