The Sun is 93 million miles away. It’s a big ball of flaming gas. It sends us energy as light and heat. Without it, we’d be nowhere. But just what are light and heat? What can they do?
Light comes at us as waves of electric and magnetic fields. Scientists call light waves electromagnetic radiation. Radiation moves energy from place to place. It’s more than just the light we see. Electromagnetic radiation also contains infrared, ultraviolet, microwaves, radio waves, and X-rays. These all help us get many jobs done.
