Arrange the following electromagnetic waves in decreasing order of their frequencies.
(A) FM radio waves
(B) UV rays
(C) Gamma rays
(D) X-rays
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (C), (D), (B), (A)
In the electromagnetic spectrum the frequency increases from radio waves through microwaves, infrared, visible light and ultraviolet to X-rays and gamma rays, which have the highest frequency.
\( (C)\ \text{Gamma rays} \gt (D)\ \text{X-rays} \gt (B)\ \text{UV rays} \gt (A)\ \text{FM radio waves} \)
The decreasing order is C, D, B, A.
NCERT (2026-27):
Gamma Rays – …
