Science glossary film: Radiation

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Though often used more narrowly to refer to ionizing radiation, the term radiation refers to any form of energy that travels through a medium, radiating outwards from a source.

Though often used more narrowly to refer to ionizing radiation, the term radiation refers to any form of energy that radiates outward from a source. All matter emits a small amount of electromagnetic radiation as a result of its own thermal energy, usually in the infrared or microwave bands. Very hot objects can glow at visible wavelengths.

All matter emits a small amount of electromagnetic radiation as a result of its own thermal energy, usually in the infrared or microwave bands. Very hot objects can glow at visible wavelengths.

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