Arrange the following radiations in the decreasing order of their energy

(A) Microwaves
(B) $γ$-rays
(C) AM radio waves
(D) Infrared waves

Choose the correct answer from the options given below:

(B), (D), (A), (C)

The correct answer is Option (1) → (B), (D), (A), (C)

Energy of radiation is given by $E = h \nu = \frac{hc}{\lambda}$

Smaller wavelength → higher frequency → higher energy

Approximate wavelengths/frequencies:

AM radio > Microwaves > Infrared > γ-rays

Decreasing energy order:

γ-rays > Infrared > Microwaves > AM radio waves

(B) > (D) > (A) > (C)