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ultraviolet radiation
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Diagram of the electromagnetic spectrum showing different types of waves arranged by wavelength and frequency, from gamma rays and X-rays to ultraviolet, visible light, infrared, microwave, TV/FM radio, shortwave radio, AM radio, and longwave radio. an image taken by the Solar and Heliospheric Observatory's Extreme-Ultraviolet Imaging Telescope Figure 1: The electromagnetic spectrum. Diagram illustrating ozone chemistry in pure oxygen, showing the cyclical reactions between molecular oxygen (O2), atomic oxygen (O), and ozone (O3), with arrows indicating conversion steps and the role of light energy. Diagram of the electromagnetic spectrum with labeled sections for radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, each paired with an example use and corresponding image.
What causes our skin to wrinkle as we age?
How does sunscreen work to protect skin?
Understand how the electromagnetic spectrum helps study the celestial bodies
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Videos

What causes our skin to wrinkle as we age?
Overview of why skin ages.
Video: Contunico © ZDF Studios GmbH, Mainz
How does sunscreen work to protect skin?
Learn how sunscreen protects human skin from ultraviolet radiation.
Video: © American Chemical Society (A Britannica Publishing Partner)
Understand how the electromagnetic spectrum helps study the celestial bodies
Astronomers use the electromagnetic spectrum to study different aspects of the Milky...
Video: Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.com

Images

electromagnetic spectrum
The electromagnetic spectrum.
Encyclopædia Britannica, Inc.
an image taken by the Solar and Heliospheric Observatory's Extreme-Ultraviolet Imaging Telescope
One of the first images taken by the Solar and Heliospheric Observatory's Extreme-Ultraviolet...
Courtesy of the Extreme-Ultraviolet Imaging Telescope Consortium
Figure 1: The electromagnetic spectrum.
Encyclopædia Britannica, Inc.
ozone chemistry
Schematic view of ozone chemistry in a pure oxygen environment. Ultraviolet light...
Encyclopædia Britannica, Inc.
Electromagnetic radiation
Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays...
Encyclopædia Britannica, Inc.
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