Arrange the following electromagnetic waves in the order of their decreasing frequency.
(A) Radio wave
(B) Gamma rays
(C) Ultraviolet ray
(D) Infrared wave
(E) Visible light
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (B) > (C) > (E) > (D) > (A)
In the electromagnetic spectrum the frequency increases and the wavelength decreases from radio waves to gamma rays. In decreasing order of frequency:
(B) Gamma rays have the highest frequencies, above \( 10^{19}\,\mathrm{Hz} \).
(C) Ultraviolet rays come next, about \( 10^{15} \) to \( 10^{17}\,\mathrm{Hz} \).
(E) Visible light follows, about \( 4\times10^{14} \) to \( 7.5\times10^{14}\,\mathrm{Hz} \).
(D) Infrared waves are lower, below \( 4\times10^{14}\,\mathrm{Hz} \).
(A) Radio waves have the lowest frequencies.
The order is (B) > (C) > (E) > (D) > (A).
NCERT (2026-27):
Gamma Rays – …
