Which term describes energy transfer through electromagnetic waves?

Which term describes energy transfer through electromagnetic waves?

• A. Conduction
• B. Convection
• C. Insulation
• D. Radiation

Answer: (D)

Energy transfer through electromagnetic waves is called radiation. It doesn’t require touching or a medium for energy to move; it can travel through space as waves. A familiar example is sunlight warming the Earth—the energy travels through the vacuum of space and heats surfaces it reaches. Conduction, by contrast, transfers heat through direct contact and particle interactions in a solid. Convection involves the bulk movement of a fluid carrying heat with it. Insulation isn’t a method of transfer itself, but a property that reduces heat flow.

Energy transfer through electromagnetic waves is called radiation. It doesn’t require touching or a medium for energy to move; it can travel through space as waves. A familiar example is sunlight warming the Earth—the energy travels through the vacuum of space and heats surfaces it reaches. Conduction, by contrast, transfers heat through direct contact and particle interactions in a solid. Convection involves the bulk movement of a fluid carrying heat with it. Insulation isn’t a method of transfer itself, but a property that reduces heat flow.