Infrared Radiation - Electromagnetic Waves

What are Infrared Radiations?

  • 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.
Infrared Radiation

Infrared Radiation from an object

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.

Applications of Infrared Radiation:

Infrared light can also term has thermal light. The light near a campfire or even the light of the sun, these kinds of lights also emit some thermal energy which causes you to feel the heat. Infrared heaters also come under this where they use infrared radiation to generate thermal energy.

Stay tuned with Byju’s to read more about infrared radiation and other electromagnetic waves that form the electromagnetic spectrum and their wide range of applications with interactive videos to make learning simple.

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Practise This Question

Which radiation in sunlight, causes heating effect