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electromagnetic spectrum

The Electromagnetic Spectrum
Image: NASA

The Electromagnetic Spectrum

We see only a tiny fraction of the energy waves that bombard us every second. If scientists hadn't learned about the others, modern life would be impossible. We wouldn't have GPS, cellphones, X-rays, or many other things. Nor would we know what distant stars are made of. Investigate the waves we crave, which together make up the electromagnetic spectrum.

NASA
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Looking Through Galactic Space Clouds

Looking Through Galactic Space Clouds

By studying all the wavelengths of light coming from outer space, including those our eyes cannot see, astronomers weave together a more complete picture of the universe. More...

Video
Institute of Physics
Mysterious Objects at the Edge of the Electromagnetic Spectrum

Mysterious Objects at the Edge of the Electromagnetic Spectrum

By looking into deep space with instruments that detect gamma rays, astronomers are discovering mysterious objects spewing out "unearthly" amounts of energy. More...

Video
NASA
Stealthy Shapes: How to Make an Aircraft Invisible to Radar

Stealthy Shapes: How to Make an Aircraft Invisible to Radar

Dreamed of being invisible? Engineers make planes almost invisible to parts of the EM spectrum. Get a feel for how with this activity. (Or just read the excellent "background" section.) More...

Activity
Science Buddies
The Electromagnetic Spectrum

The Electromagnetic Spectrum

Still unsure which wavelengths belong where on the electromagnetic spectrum, or what their uses are? Then don't miss this animation and quiz. More...

Interactive
BBC
Absorption of Radiant Energy by Different Colors

Absorption of Radiant Energy by Different Colors

Ever wondered why a white shirt is cooler than a black one? With this activity, you'll discover the amount of energy that different colored objects absorb and re-emit.
More...

Activity
Science Buddies
Electromagnetic Spectrum

Electromagnetic Spectrum

Find out about the different types of waves in the electromagnetic spectrum by clicking on the labels in the image. Notice how little of the spectrum we can see. More...

Interactive
aliensearth.org
Electromagnetic Spectrum: Interactive

Electromagnetic Spectrum: Interactive

Explore the EM spectrum, from its longest radio wave to its most energetic gamma ray, using this interactive graphic. More...

Interactive
Scripps Institution of Oceanography
Electromagnetic Spectrum: Quiz

Electromagnetic Spectrum: Quiz

Are you a master of the electromagnetic spectrum? Prove it by taking this quiz from NASA. More...

Interactive
NASA
Electromagnetic Spectrum: Radio Waves

Electromagnetic Spectrum: Radio Waves

The first radio transmission has now passed over 1,000 stars. With good enough radio receivers, aliens orbiting those stars could have tuned in to that transmission. More...

Video
NASA
EM Spectrum Song

EM Spectrum Song

Warning: Earworm alert! While this song will help you remember the differences between light waves, it may not be possible to get out of your head. More...

Video
The Bonus Point Band
Ionizing & Non-Ionizing Radiation

Ionizing & Non-Ionizing Radiation

X-rays and gamma rays are forms of ionizing radiation. Find out what that means here. Then scroll down and click "Health Effects" to find out how dangerous ionizing radiation can be. More...

Article
Environmental Protection Agency
Light Facts

Light Facts

Did you know light travels at different speeds through different materials? A snack of facts awaits you here. More...

Article
Science Kids

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