Radiation is a fascinating mode of heat transfer that occurs through electromagnetic waves. Unlike conduction and convection, which require a medium to transfer heat, radiation can occur even in the vacuum of space. This makes it a significant mechanism for heat transfer in various scenarios.

One common example of radiation is the heat we receive from the Sun. The Sun emits electromagnetic radiation, including infrared radiation, which travels through space and reaches the Earth. When this radiation encounters an object, it can be absorbed, reflected, or transmitted.

Another example of radiation is the heat emitted by a glowing incandescent light bulb. As the filament inside the bulb heats up, it emits visible light and infrared radiation. This radiation can then be absorbed by surrounding objects, thereby heating them up.

Radiation can also occur between objects at different temperatures in close proximity. A classic example is the transfer of heat between a hot teapot and the surrounding air. The teapot emits infrared radiation, which is absorbed by the air molecules, causing them to gain kinetic energy and heat up.

Overall, radiation is an essential mode of heat transfer that plays a crucial role in our daily lives, whether it's the warmth we feel under the Sun, the heat emitted by electronic devices, or the energy absorbed by our surroundings.