Which term refers to the transmission of energy via electromagnetic waves?

The term that refers to the transmission of energy via electromagnetic waves is radiation. This process involves the transfer of energy through the vacuum of space or through transparent materials without the need for a medium. Electromagnetic waves encompass a wide range of wavelengths, including visible light, infrared, ultraviolet, and radio waves.

Radiation is a fundamental concept in physics and is responsible for phenomena such as solar energy reaching the Earth, heat emitted from warm objects, and the operation of technologies like microwaves and radios. Understanding radiation is crucial for applications in power engineering, particularly in relation to thermal management and energy transfer processes.

In contrast, conduction involves the transfer of heat through direct contact between materials, where energy is passed from molecule to molecule. Convection refers to the movement of heat through fluids (liquids or gases) caused by the fluid's motion, which typically involves the circulation of warmer and cooler areas. Concentration, while it may occur in discussions of energy or material, does not specifically pertain to the transmission of energy through electromagnetic waves.