Arrange the following electromagnetic waves in decreasing order of their wavelengths.
(A) Microwaves
(B) X- rays
(C) Radio waves
(D) Visible Light rays
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (C), (A), (D), (B)
In the electromagnetic spectrum, the wavelength decreases from radio waves through microwaves, infrared, visible light and ultraviolet to X-rays and gamma rays. Typical wavelengths:
\( (C)\ \text{Radio waves: more than } 0.1\,\mathrm{m} \)
\( (A)\ \text{Microwaves: } 0.1\,\mathrm{m} \text{ to } 1\,\mathrm{mm} \)
\( (D)\ \text{Visible Light rays: } 700\,\mathrm{nm} \text{ to } 400\,\mathrm{nm} \)
\( (B)\ \text{X- rays: } 10\,\mathrm{nm} \text{ to } 10^{-4}\,\mathrm{nm} \)
Decreasing order of wavelength: (C), (A), (D), (B).
NCERT (2026-27):
Gamma Rays – …
