What is described as the emission of energy as electromagnetic waves or moving subatomic particles?

The emission of energy as electromagnetic waves or moving subatomic particles is described as radiation. This concept encompasses various forms of energy transfer, including light and heat, which are emitted by a source. Radiation travels through space without the need for a medium, unlike conduction and convection, which require matter to transfer heat.

Radiation can be experienced in many everyday situations, such as feeling the warmth of the sun on your skin or the heat from a fire, both of which involve the transfer of energy through electromagnetic waves. Understanding radiation is essential in fields like emergency response, particularly when dealing with hazardous materials or situations involving sources of radiation. This knowledge helps responders take appropriate precautions and apply the right interventions when faced with potential exposure to radiation in various scenarios.