Arrange the following electromagnetic waves in the increasing order of their wavelengths.
A. Gamma rays
B. X-rays
C. Infrared waves
D. Microwaves
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A, B, C, D
In the electromagnetic spectrum, the wavelength increases from gamma rays through X-rays, ultraviolet, visible and infrared to microwaves and radio waves. Typical wavelength ranges:
(A) Gamma rays: less than \( 10^{-3}\,\mathrm{nm} \)
(B) X-rays: \( 10^{-3}\,\mathrm{nm} \) to \( 1\,\mathrm{nm} \)
(C) Infrared waves: \( 700\,\mathrm{nm} \) to \( 1\,\mathrm{mm} \)
(D) Microwaves: \( 1\,\mathrm{mm} \) to \( 0.1\,\mathrm{m} \)
So the increasing order of wavelength is A, B, C, D.
NCERT (2026-27):
Gamma Rays – …
