Gasses and their spectral signatures

Stars are made up of different gasses, each radiating a colored light with unique spectral (rainbow-like) signature. We normally do not see these spectra, but if we look at the light through a filter, the spectra emerge. Astronomers therefore use filters on their telescopes so they can see and identify the spectra, and finally identify the gasses that make up the stars.

In the Adler's "Spectra" exhibit, clear tubes filled with different gasses are mounted in a box and connected to a power source activated through buttons. When you press one or more buttons, the different tubes light up. It is almost like a light piano! If you place a filter in front the lit tube, you can see that gas' unique spectrum.

Choose a gas . . .

Back to Light! Spectra! Action!

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