Which term describes energy transfer by electromagnetic waves?

Which term describes energy transfer by electromagnetic waves?

• A. Potential energy
• B. Kinetic energy
• C. Radiation
• D. Conduction

Answer: (C)

Energy transfer by electromagnetic waves is called radiation. Electromagnetic waves—like visible light, radio waves, infrared, and X-rays—carry energy through space and can move through a vacuum, so they don’t need matter to transfer energy. That’s why sunlight can warm the Earth even though there’s empty space between us and the Sun. Potential energy and kinetic energy describe forms of energy an object has, not how energy is moved from one place to another. Conduction transfers energy by direct contact and molecular interactions in matter, which requires a medium. Radiation uniquely fits the idea of transferring energy via EM waves, possibly across empty space.

Energy transfer by electromagnetic waves is called radiation. Electromagnetic waves—like visible light, radio waves, infrared, and X-rays—carry energy through space and can move through a vacuum, so they don’t need matter to transfer energy. That’s why sunlight can warm the Earth even though there’s empty space between us and the Sun.

Potential energy and kinetic energy describe forms of energy an object has, not how energy is moved from one place to another. Conduction transfers energy by direct contact and molecular interactions in matter, which requires a medium. Radiation uniquely fits the idea of transferring energy via EM waves, possibly across empty space.