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The CEA Light Tour will let you discover basic information about light in the Universe and how astronomers make use of light wavelengths. If you're not too sure how to measure a light wavelength or even what it is, then go into the light wavelength area to start off the Light Tour.

You'll be entering values that are wavelengths of light. You'll be working with angstroms. An angstrom is a unit of length like inches or centimeters only much smaller. It is used to measure light wavelengths. You start off by just picking any number (yup, any number that will fit in the box!) and putting the number you've chosen in the box below. Don't bother writing "angstroms." You can enter really small numbers like .000004 or really large numbers like 1,000,000,000.

What comes out when you put the number in? Well, just try it and find out. Have Fun!

My wavelength value is...



All text, images, and other resources in this page are Copyright © 1996, The Regents of the University of California. All rights reserved. Program by R. Battle. Graphics by R. Battle. For permission, email outreach@ssl.berkeley.edu