General information on electromagnetic waves.

1. Electromagnetic
Waves

2. When you listen to the radio, watch TV, or cook
dinner in a microwave oven, you are using
electromagnetic waves.

3. All electromagnetic waves move at the speed of
light.
Electromagnetic waves can be described by their
wavelength, energy, and frequency.

4. The electromagnetic spectrum includes, from
longest wavelength to shortest: radio waves,
microwaves, infrared, optical, ultraviolet, X-
rays, and gamma-rays.