Optics Question 941
Question: What happens to light as it passes from glass into air?
Options:
A) Its frequency decreases because its speed decreases
B) Its frequency increases because its speed increases.
C) Its wavelength decreases because its speed decreases
D) Its wavelength increases because its speed increases
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ Rl _{air}<R{l _{glass,}} $ so $ v _{air}>v _{glas} $ and hence $ {\lambda _{air}}>{\lambda _{glass}} $ .
