Question

which region of the electromagnetic spectrum below has the longest wavelengths? a red light b gamma radiation c microwaves d ultraviolet radiation

Explanation:

In the electromagnetic spectrum, the wavelength decreases in the order of radio waves > microwaves > infrared > visible light > ultraviolet > X - rays > gamma rays. Red light is part of visible light. Microwaves have longer wavelengths than visible light (including red light), and gamma radiation and ultraviolet radiation have shorter wavelengths than visible light.

Answer:

C. microwaves