Emission Spectrum

If you view the light of discharge tubes through a diffraction grating, you can see the emission spectrum directly.

Detail at https://xmdemo.wordpress.com/036

To make sure you know what a non-discrete spectrum look like, this video shows you (1) the continuous spectrum of a filament lamp, (2) the discrete line spectrum of a LED and (3) the “combo” spectrum of a fluorescent lamp.

Detail at https://xmdemo.wordpress.com/037

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