Modern Physics > Atomic Physics > Spectra

DCS# 7B10.10

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SODIUM SPECTRUM

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APPARATUS

sodium lamp	101-08-A
hand-held diffraction grating	202-21-E5

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DESCRIPTION

Students view sodium lamp through diffraction gratings to see spectral lines of sodium.

 

NOTES

 

The sodium lamp takes about 5 minutes to warm up.  The light will initially appear red-orange, because of some neon gas in the tube.

Set-up: