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Definition of "UV" |
Ultraviolet / Ultra-Violet light. Refer to a Graph of the UV Spectrum. / Universidad Veracruzana, Upper Voice, Union Valenciana, Ultraviolet, / Ultraviolet light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm and 100 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet. These frequencies are invisible to most humans except those with aphakia. Near-UV is visible to a number of insects and birds. / In POP connections, the server will usually close a client connection after a certain period of inactivity the timeout period. This ensures that connections do not persist forever, if the client crashes or the network goes down. Open connections consume resources, and may prevent other clients from accessing the same mailbox. |
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