10: Radiation, Electromagnetic Waves, Biological Effects of UV Radiation
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- 10.1: Radiation and Electromagnetic waves
- A wave is an oscillation or periodic movement that can transport energy from one point in space to another. Common examples of waves are all around us. Shaking the end of a rope transfers energy from your hand to the other end of the rope, dropping a pebble into a pond causes waves to ripple outward along the water's surface, and the expansion of air that accompanies a lightning strike generates sound waves (thunder) that can travel outward for several miles.
Thumbnail: CFCs & Ozone. (CC BY-SA 4.0; Nicole Leihe via Wikimedia )