Adjust the redshift z in the applet below using the + and - buttons until the redshifted template of rest wavelengths in RED matches the "observed" spectrum in BLACK. Click the "Show" button to see the actual redshift and compare it to your value. Then click "Restart" to try again with a different randomly generated redshift and spectrum.

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The numbers on the red template and the spectrum are wavelengths in nanometers.

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© 1998-1999 Edward L. Wright. Last modified 27-Mar-1999