Infrared radiation

Definition

Infrared radiation is a type of electromagnetic wave with wavelengths longer than visible light but shorter than microwaves. It is commonly associated with heat emission and can be detected using thermal imaging cameras.

5 Must Know Facts For Your Next Test

1. Infrared radiation has wavelengths ranging from approximately 700 nm to 1 mm.
2. It is divided into three categories: near-infrared, mid-infrared, and far-infrared.
3. Infrared radiation is emitted by all objects with a temperature above absolute zero due to thermal motion.
4. It plays a significant role in heat transfer processes, including radiation from the Sun and heating applications on Earth.
5. Infrared spectroscopy is used in scientific research to identify and study chemical substances.

Review Questions

• What are the wavelength ranges for infrared radiation?
• How does infrared radiation contribute to heat transfer?
• What are some applications of infrared spectroscopy?

Related terms

Electromagnetic Spectrum: The range of all types of electromagnetic radiation, extending from radio waves to gamma rays.

Thermal Imaging: A technique that uses infrared sensors to detect heat emitted by objects, often used in night vision equipment.

Wavelength:

The distance between successive crests of a wave, typically measured in meters or nanometers in the context of electromagnetic waves.