Question

The waves used in common TV remote control are-
1. X-Rays
2. Ultra-violet Rays
3. Infra Red Rays
4. Gamma Rays

Answer 1

Correct Answer - Option 3 : Infra Red Rays

• Infra Red rays are used in a common TV remote control. 
• Sometimes referred to simply as infrared, it is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometres (nm) to 1 millimeter (mm). 
• Infrared waves are longer than those of visible light but shorter than those of radio waves.

Ray	Feature
Infrared radiation (IR),	Sometimes referred to simply as infrared, it is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometres (nm) to 1 millimeter (mm). Infrared waves are longer than those of visible light but shorter than those of radio waves.
X-rays	Makeup X-radiation, a form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 0.1 to 10 nanometres. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to as Rontgen radiation after the German scientist Wilhelm Rontgen, who discovered it on November 8, 1895.
Ultraviolet (UV)	It is electromagnetic radiation with a wavelength from 10 nm (with a corresponding frequency of approximately 30 PHz) to 400 nm (750 THz), shorter than that of visible light but longer than X-rays. UV radiation is present in sunlight and constitutes about 10% of the total electromagnetic radiation output from the Sun.
Gamma-ray,	Gamma radiation is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy. Paul Villard, a French chemist, and physicist, discovered gamma radiation in 1900.