The Electromagnetic Spectrum
GAMMA RAYS
Gamma Rays have the smallest wavelengths and most energy of any wave in the spectrum. They can be generated by nuclear explosions, lightning, and radioactive decay.
The Electromagnetic Spectrum
X-RAYS
X-rays have very high energy and short wavelengths, between 0.03 and 3 nanometers. Some are no bigger than a single atom of many elements.
The Electromagnetic Spectrum
ULTRAVIOLET
UV has shorter wavelengths than visible light, though some insects like bumblebees can actually see it. Fortunately, about 95% of harmful UV-B rays are absorbed by Earth's ozone.
The Electromagnetic Spectrum
VISIBLE LIGHT
All electromagnetic radiation is light—the portion our eyes can see, we call visible light. Cone-shaped cells in our eyes act as receivers tuned to the wavelengths in this narrow band of the spectrum.
The Electromagnetic Spectrum
INFRARED
Infrared light waves are just beyond the spectrum of light visible to the human eye. Most of the energy of the sun arrives on earth as infrared light.
The Electromagnetic Spectrum
RADIO WAVES
Radio waves have the longest wavelengths in the electromagnetic spectrum, ranging from the length of a football to larger than our planet.




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