Emission Spectrum Of Hydrogen
by Dept. Of Physics, Imperial College/science Photo Library
Title
Emission Spectrum Of Hydrogen
Artist
Dept. Of Physics, Imperial College/science Photo Library
Medium
Photograph - Photograph
Description
Emission spectrum of hydrogen. When atoms of an element are excited (e.g. by heating), they return to their state of lowest energy by emitting radia- tion at specific wavelengths. If this radiation is passed through a spectrometer, a spectrum is prod- uced which displays the element's characteristic emission lines". The lines are a unique "finger- print" of an element. Hydrogen's predominant lines are at 6563 (red), 4861 (cyan) & 4340 angstroms (blue). The many fainter lines are not visible in this photo. Hydrogen atoms can exist in a number of energy states, producing 4 different spectra. This example is known as a "Balmer spectrum"."
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October 2nd, 2018
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