# Infrared Radiation - Electromagnetic Waves

• Infrared radiations are also referred to as heat or thermal waves or electromagnetic waves. This is because they have a heat inducing property. Sometimes infrared rays are used in applications where heat production is required like in infrared heaters or for therapeutic purposes where a patient requires physical therapy.
• These waves have a wavelength range between 710 nm to 1 mm. Sometimes infrared rays themselves are classified as near infrared and far infrared rays.
• Near-infrared rays are used in electronic applications like TV remote sensors and photography. Their applications can be somewhat similar to visible light applications since their wavelength ranges are close.
• Far infrared rays are more thermal in nature. Anything generating heat gives out far infrared radiation. Even the human body (at $37^{\circ}C$ ) gives off infrared radiations of around 800 nm wavelength.

## Medicinal Effect of Infrared Rays:

• It plays an important aid in stress management.
• It helps cure fatigue and cold. It is also helpful with the exhaustion of the human body.
• It is useful to ease kidney function.
• It reduces pain in herniated disc and arthritis.
• It helps to reduce inflammation of throat, nose and ear.