Radiation is another way of heat transfer, like convection and conduction. It's how we get heat from the sun.
Heat is radiated as infrared waves, which travel in straight lines at the speed of light.
Radiation can occur in a vacuum, where there are no particles, like space.
It can also only occur through transparent substances, like air, glass, and water, because it involves light.
A surface's colour and texture can affect how much radiation is absorbed or emitted by it.
All objects are…