Question

The waves used in heating of food
1. Radio waves
2. Infrared waves
3. X-Rays
4. UV Rays

Answer 1

Correct Answer - Option 2 : Infrared waves

Explanation:

• Infrared is a type of electromagnetic radiation is used in the remote control of a television.
• Infrared is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye.
• Infrared light is even used to heat food sometimes - special lamps that emit thermal infrared waves are often used in fast-food restaurants.

• Ultraviolet (UV) has a higher frequency (thus a shorter wavelength) than violet light.
• UV radiation is widely used in industrial processes and in medical and dental practices for a variety of purposes, such as killing bacteria, creating fluorescent effects, curing inks and resins, phototherapy, and suntanning.
• Sunlight is the main source of UV radiation.
• Ultraviolet light has wavelengths between 10 and 400 nm that are shorter than visible light but longer than X-rays.
• It is a type of electromagnetic radiation.
• It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights.
• Ultraviolet rays are invisible to most humans.
• UV radiation was discovered in 1801 by the German physicist Johann Wilhelm Ritter.