The mercury and sodium street lamps light up because of ?
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The mercury and sodium street lamps light up because of Atomic emission.
It is a method in which chemical analysis is used to intensify the light that is emitted from a plasma, flame, spark that have a particular wavelength to determine the quantity of an element in a sample.
The atomic spectral line wavelength gives an identity of an element whereas intensity will be proportional to the number of atoms of an element.
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