Emission Spectrum Of Cadmium
by Dept. Of Physics, Imperial College/science Photo Library
Title
Emission Spectrum Of Cadmium
Artist
Dept. Of Physics, Imperial College/science Photo Library
Medium
Photograph - Photograph
Description
Emission spectrum of cadmium. When atoms of an element are excited (for instance by heating), they return to their state of lowest energy by emitting radiation at specific wavelengths. If this radiation is passed through a spectrometer, a spectrum is produced which displays the element's characteristic emission lines". The lines are a unique "fingerprint" of an element. Cadmium's predominant lines (right to left) are at 6438 & 6359 angstroms (red), 5085 (green), 4800, 4678 & 4414 angstroms (blue). Many fainter lines are not visible in this photograph."
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September 21st, 2018
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