"emission spectrum." YourDictionary, n.d. Web. 21 November 2018. <https://www.yourdictionary.com/emission-spectrum>.
emission spectrum. (n.d.). Retrieved November 21st, 2018, from https://www.yourdictionary.com/emission-spectrum
The distribution of electromagnetic radiation released by a substance whose atoms have been excited by heat or radiation. A spectroscope can be used to determine which frequencies have been emitted by a substance. The emission spectrum is a combination of the atomic spectra of the various kinds of atoms making up the substance and can be analyzed to determine the substance's chemical or atomic composition.