Ruby spectrum under blue LED

Spectrum of ruby stimulated by a blue LED and taken through a toy spectroscope. The top image was exposed less to show the features on the blue side of the R-line (doublet) at 693nm/694nm. The bottom image was exposed more to show the features on the red side of the R-line.

 

See also:

www.fluomin.org/uk/fiche.php?id=870

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