Optics Question 269
Question: Pick out the longest wavelength from the following types of radiations
[CBSE PMT 1990]
Options:
A) Blue light
B) g-rays
C) X-rays
D) Red light
Show Answer
Answer:
Correct Answer: D
Solution:
$ {\lambda _{Red}}>{\lambda _{Blue}}>{\lambda _{X-ray}}>{\lambda _{\gamma }} $