Difference between revisions of "Spectroscopy"
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: If [[White Light|white light]] passes through a [[gas]] before it reaches the '''spectroscope''' the [[chemical]]s in the [[gas]] will [[Absorb (Physics)|absorb]] certain [[wavelength]]s of [[light]] that are unique to the [[chemical]]s in that [[gas]]. When this [[light]] is passed through a '''spectroscope''' it produces an [[Absorption Spectra|absorption spectrum]] that appears as a rainbow but with dark lines at specific [[wavelength]]s. | : If [[White Light|white light]] passes through a [[gas]] before it reaches the '''spectroscope''' the [[chemical]]s in the [[gas]] will [[Absorb (Physics)|absorb]] certain [[wavelength]]s of [[light]] that are unique to the [[chemical]]s in that [[gas]]. When this [[light]] is passed through a '''spectroscope''' it produces an [[Absorption Spectra|absorption spectrum]] that appears as a rainbow but with dark lines at specific [[wavelength]]s. | ||
: If the [[electron]]s in a [[chemical]] gain [[energy]] they can move up to a higher [[Electron Orbital|electron orbital]]. When they fall back down to the lower [[Electron Orbital|electron orbital]] they release a specific [[wavelength]]s of [[light]]. When this [[light]] is passed through a '''spectroscope''' it produces an [[Emission Spectra|emission spectrum]] or a [[Emission Spectra|line spectrum]] that appears as a series of lines of specific [[wavelength]]s. | : If the [[electron]]s in a [[chemical]] gain [[energy]] they can move up to a higher [[Electron Orbital|electron orbital]]. When they fall back down to the lower [[Electron Orbital|electron orbital]] they release a specific [[wavelength]]s of [[light]]. When this [[light]] is passed through a '''spectroscope''' it produces an [[Emission Spectra|emission spectrum]] or a [[Emission Spectra|line spectrum]] that appears as a series of lines of specific [[wavelength]]s. | ||
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| + | ===Extra Information=== | ||
| + | {{#ev:youtube|https://www.youtube.com/watch?v=HZ7hwUduMoU}} | ||
Latest revision as of 17:52, 20 April 2019
Key Stage 4
Meaning
Spectroscopy is a technique used to identify elements and compounds by the wavelengths of light they either absorb or emit.
About Spectroscopy
- When white light passes through a spectroscope the colours are split into a spectrum (the rainbow).
- If white light passes through a gas before it reaches the spectroscope the chemicals in the gas will absorb certain wavelengths of light that are unique to the chemicals in that gas. When this light is passed through a spectroscope it produces an absorption spectrum that appears as a rainbow but with dark lines at specific wavelengths.
- If the electrons in a chemical gain energy they can move up to a higher electron orbital. When they fall back down to the lower electron orbital they release a specific wavelengths of light. When this light is passed through a spectroscope it produces an emission spectrum or a line spectrum that appears as a series of lines of specific wavelengths.