ultraviolet photon

collocation in English

meaningsofultravioletandphoton

These words are often used together. Click on the links below to explore the meanings. Or,see other collocations withphoton.
ultraviolet
adjective
uk
/ˌʌl.trəˈvaɪə.lət/us
/ˌʌl.trəˈvaɪə.lət/
Ultraviolet light has a wavelength that is after the violet (= light purple) end of the range of colours that can be seen by humans. Light of this type causes the skin to become darker in ...
See more atultraviolet
photon
noun[C]
uk
/ˈfəʊ.tɒn/us
/ˈfoʊ.tɑːn/
a single unit ...
See more atphoton

(Definition ofultravioletandphotonfrom theCambridge English Dictionary© Cambridge University Press)

Examplesofultraviolet photon

These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
Ultraviolet photons of wavelengths less than 169 nm can photodissociate carbon dioxide into carbon monoxide and atomic oxygen.
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Ozone is formed in the stratosphere when oxygen molecules photodissociate after intaking anultravioletphotonwhose wavelength is shorter than 240 nm.
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This happens because atultravioletphotonenergies, molecules may become electronically-excited or promoted to free-radical form, even without ionization taking place.
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This higher energy state is unstable, and the atom will emit anultravioletphotonas the atom's electron reverts to a lower, more stable, energy level.
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In this case, photoelectrons are emitted from the lunar surface due to solar ultraviolet photons.
From theCambridge English Corpus
Highly energetic ultraviolet photons can convert electrical neutral hydrogen gas into ionized gas.
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These ionized gas atoms, or plasmas, then release ultraviolet photons that interact with a phosphor material on the inside wall of the cell.
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The ultraviolet photons emitted by the plasma excite these phosphors, which give off visible light with colors determined by the phosphor materials.
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The outer portion of solar mass stars is cool enough that hydrogen is neutral and thus opaque to ultraviolet photons, so convection dominates.
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These properties derive from the ultraviolet photon's power to alter chemical bonds in molecules, even without having enough energy to ionize atoms.
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The oxygen is added as noble gas with carbon dioxide has too high transparency for high-energy photons; ozone formed from the oxygen is a strong absorber of ultraviolet photons.
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Ultraviolet photons are absorbed by electrons in the atoms of the lamp's interior fluorescent coating, causing a similar energy jump, then drop, with emission of a further photon.
From
Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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