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

Electromagnetic radiation is organized in the electromagnetic spectrum, ordered based on wavelength. The order of electromagnetic radiation according to wavelength, from longest to shortest is: Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays and
Gamma rays. Therefore:
• Microwaves: These have the longest wavelength of the given options and the lowest energy
• Visible rays: Visible light has an intermediate wavelength, ranging between about 400- 700 nm
• X-rays: X-rays have a shorter wavelength than visible light, and are associated with higher energy.
• Gamma rays: Gamma rays have the shortest wavelength and the highest energy amongst the given radiations.
The correct order of decreasing wavelength is therefore, Microwaves > Visible rays> X-rays > Gamma rays