| 词汇 | example_english_ultraviolet-photon |
| 释义 | ultraviolet photoncollocation in Englishmeanings of ultravioletand photonThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with photon. 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 at ultraviolet photon noun[C] uk /ˈfəʊ.tɒn/ us /ˈfoʊ.tɑːn/ a single unit ... See more at photon Examples of ultraviolet photonThese 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. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Ozone is formed in the stratosphere when oxygen molecules photodissociate after intaking an ultravioletphoton whose wavelength is shorter than 240 nm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This happens because at ultravioletphoton energies, molecules may become electronically-excited or promoted to free-radical form, even without ionization taking place. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This higher energy state is unstable, and the atom will emit an ultravioletphoton as the atom's electron reverts to a lower, more stable, energy level. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In this case, photoelectrons are emitted from the lunar surface due to solar ultraviolet photons. Highly energetic ultraviolet photons can convert electrical neutral hydrogen gas into ionized gas. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These ionized gas atoms, or plasmas, then release ultraviolet photons that interact with a phosphor material on the inside wall of the cell. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The ultraviolet photons emitted by the plasma excite these phosphors, which give off visible light with colors determined by the phosphor materials. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The outer portion of solar mass stars is cool enough that hydrogen is neutral and thus opaque to ultraviolet photons, so convection dominates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These properties derive from the ultraviolet photon's power to alter chemical bonds in molecules, even without having enough energy to ionize atoms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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. Want to learn more? Go to the definition of ultraviolet Go to the definition of photon See other collocations with photon |
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