Question

Which wavelength of sun is used finally as electric energy?

• A. Visible light
• B. Radio waves
• C. Microwaves
• D. Infrared waves

Answer 1

The correct option is D

Infrared waves

Infrared Waves:

1. Infrared waves, also known as heat waves, are used to generate electricity by heating thermocouples.
2. Solar cells and solar heaters use infrared waves.
3. The electromagnetic spectrum includes infrared light and infrared waves.
4. Every day, people are exposed to infrared waves; the human eye cannot see them, but humans can detect them as heat.
5. To change channels on your TV, the remote control uses light waves that are just beyond the visible spectrum of light—infrared light waves.

Hence, Option(D) is correct.