What is a common example of radiant heat transfer?

Radiant heat transfer occurs when heat energy is emitted as infrared radiation, which can travel through space without requiring a medium like air or water to transfer that energy. A prime example of this type of heat transfer is solar energy from the sun. The sun emits electromagnetic radiation, which includes infrared radiation, that travels through the vacuum of space and reaches the Earth, warming it without direct contact or a medium.

In contrast, heat from a stovetop and heat absorbed by water involve conduction, which requires direct contact between materials, while heat from a fire moving through the air involves convection, which relies on the movement of air molecules to transfer heat. These mechanisms highlight the distinct nature of radiant heat transfer, underscoring why solar energy is the correct choice in this context.