Which of the arrangements of radiations below shows decreasing order of wavelengths?

A. X-rays> radio waves > infrared radiations
B. Radio waves> infrared radiations > X-rays
C. Infrared radiations > radio waves > X-rays
D. X-rays> infrared radiations > radio waves

Correct Answer:

Option B = Radio waves> infrared radiations > X-rays

Explanation

Radio waves have a longer wavelength than infrared light, and infrared than x-rays in the electromagnetic spectrum.