Question

Which one of the following types of waves are used in remote control and night vision camera?

• A. Radio waves
• B. Microwaves
• C. Infra-red waves
• D. None of the above

Answer 1

Answer:

C. Infra-red waves

Infrared waves are used in a night vision apparatus. All objects on Earth emit IR radiation in the form of heat. This can be detected by electronic sensors, such as those used in night-vision goggles and infrared cameras.