Infrared radiation

Definition

Infrared radiation refers to electromagnetic waves with longer wavelengths than those of visible light but shorter than microwaves. It is associated with heat energy and is often used in devices like remote controls and thermal cameras.

Analogy

Think of infrared radiation as invisible heat rays that we can't see but can feel. Just like how you can feel the warmth from a campfire without seeing the flames, infrared radiation allows us to sense heat even though it's not visible to our eyes.

Related terms

Ultraviolet (UV) radiation: Ultraviolet radiation has shorter wavelengths than visible light and is responsible for sunburns. It is also used in sterilization processes.

Thermal energy: Thermal energy refers to the total kinetic energy of particles within an object or substance. Infrared radiation is one way that thermal energy can be transferred.

Electromagnetic spectrum: The electromagnetic spectrum encompasses all types of electromagnetic waves, including infrared radiation, visible light, ultraviolet radiation, microwaves, and more.