| EM Frequency | Real-World Examples |
| Gamma waves | Emitted by radioactive substances, such as the glucose tracers used in PET imaging |
| X-rays | X-ray machines (CT scanners included) used to generate pictures of the inside of the body |
| Ultraviolet | Sun rays that tan your skin (and can give you cancer) |
| Visible | What you see |
| Infrared | Heat emitted from human bodies |
| Microwaves | Microwave ovens, cell phones |
| Radio waves | AM and FM radios, televisions, wireless Internet |
| We use electromagnetic energy for a variety of purposes, from warming our dinners to carrying on digital conversations. Visible light is the only part of the spectrum detectable by human eyes. |
| SOURCE: ADAPTED FROM BERKELEY LAB (N.D.). |