Difference between revisions of "Emission Spectra"
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| − | [[File:FlameEmissionSpectroscopy.png|right|300px|thumb|The [[Emission Spectra|emission spectra]] | + | [[File:FlameEmissionSpectroscopy.png|right|300px|thumb|The [[Emission Spectra|emission spectra]] of several [[metal]]s.]] |
'''Emission spectra''' are the specific [[wavelength]]s of [[light]] [[emit]]ted by the [[electron]]s in [[atom]]s as they lose [[energy]]. | '''Emission spectra''' are the specific [[wavelength]]s of [[light]] [[emit]]ted by the [[electron]]s in [[atom]]s as they lose [[energy]]. | ||
Revision as of 13:14, 22 February 2019
Key Stage 4
Meaning
Emission spectra are the specific wavelengths of light emitted by the electrons in atoms as they lose energy.
About Emission Spectra
- The spectrum of white light is a continuous change of colours with all wavelengths having the same intensity.
- An emission spectrum is a set of specific wavelengths with a high intensity. This appears as bright lines of colour on a spectrum.
- A emission spectrum is created when excited electrons (electrons in high energy levels) lose energy and fall to a lower energy level emitting a specific wavelength of electromagnetic wave when they do.
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| This diagram shows an excited electron losing energy by emitting an electromagnetic wave. As it does this the electron falls back down to a lower energy level. |