Question

Which one of the following types of waves are used in a night vision apparatus?

• A. Microwaves.
• B. Radio Waves.
• C. Infra-red Waves.
• D. None Of The Above.

Answer 1

The correct option is C

Infra-red Waves.

Infra-red Waves:

1. Infrared waves are used in the night vision apparatus such as night vision goggles.
2. Infrared waves, also known as infrared light, are a type of electromagnetic wave.
3. Every day, people are exposed to infrared waves; the human eye cannot see them, but humans can detect them as heat.
4. To change channels on your TV, the remote control uses light waves that are just beyond the visible spectrum of light—infrared light waves.
5. Infrared radiation (IR), also known simply as infrared, is a region of the electromagnetic radiation spectrum with wavelengths ranging from 700 nanometers (nm) to one millimeter (mm).

Hence, Option(C) is correct.