Question

Arrange the following electromagnetic radiations in the order of decreasing wavelength:
(A) Microwaves,
(B) Gamma rays,
(C) X-rays,
(D) Visible rays

• A. (A), (D), (C), (B)
• B. (B), (C), (D), (A)
• C. (B), (A), (D), (C)
• D. (C), (B), (D), (A)

Hint:

Remember the relationship between wavelength and energy: Longer wavelengths have less energy, and shorter wavelengths have more energy.

Answer 1

The Correct Option is A

The electromagnetic spectrum organizes radiation by wavelength. The complete order, from longest to shortest, includes Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays and
Gamma rays. Consequently:
• Microwaves: Among the given options, these have the longest wavelength and lowest energy.
• Visible rays: Visible light features an intermediate wavelength, typically ranging from 400-700 nm.
• X-rays: These possess a shorter wavelength than visible light, corresponding to higher energy.
• Gamma rays: Of the listed radiations, Gamma rays have the shortest wavelength and highest energy.
Thus, the correct decreasing order of wavelength is: Microwaves > Visible rays > X-rays > Gamma rays.