Ultraviolet light photon

Scintillators are also used in the detectors of CT scanners. Here an electronic detector, the photomultiplier tube, is used to produce an electrical signal from the visible and ultraviolet light photons. These imaging systems typically need fast scintillators with a high efficiency. 

UV Ultraviolet light photon Q + Q + O" " Positive ions Q Electron... 

Scintillation detectors are substances which fluoresce when stmck by x-radiation. Scintillation can, therefore, serve to convert x-ray photons into visible or ultraviolet light. Scintillation materials include thaUium-activatedcrystals of sodium iodide, NaI(Tl), potassium iodide, KI(T1), or cesium iodide, CsI(Tl) crystals of stilbene (a, P-diphenylethylene) [588-59-0] and anthracene [120-12-7] bismuth germanium oxide [12233-56-6] ... 

Ultraviolet light is also harmful to the eyes. Although our eyes do not detect UV photons, the lens of the eye is particularly susceptible to damage by UV light. The lens focuses visible photons, but it does not absorb... 

C07-0046. Calculate the energy in joules per photon and in kilojoules per mole of the following (a) red light with a wavelength of 665.7 nm (b) infrared radiation whose wavelength is 1255 nm and (c) ultraviolet light with a frequency of 4.5528 X 10 Hz. 

O2+I1 Vf i 240 nm) 2 O3 An oxygen molecule absorbs a photon (k v) of high-energy ultraviolet light (A < 240 rnn). The energy of the photon breaks O2 into two O atoms ... 

Photochemistry is the branch of chemistry which relates to the interactions between matter and photons of visible or ultraviolet light and the subsequent physical and chemical processes which occur from the electronically excited state formed by photon absorption. 

A hot star at the centre is surrounded by a bright shell of gas that has detached itself from the central star. The gas shines by fluorescence. It absorbs ultraviolet light from the small, hot central star (white dwarf) and re-emits it in the form of visible light. The big banknotes (LTV photons) are exchanged for smaller... 

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