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.
