What an emission spectrum?
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The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. ... Therefore, spectroscopy can be used to identify elements in matter of unknown composition.
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An atomic emission spectrum is the pattern of lines formed when light passes through a prism to separate it into the different frequencies of light it contains. ... Each of these spectral lines corresponds to a different electron transition from a higher energy state to a lower energy state.
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