Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
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.
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 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.