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• VECOM
• velocity of light
• VIS
• viscosity
• VMR
• VSF

VIS - visible electromagnetic radiation, light. This term refers typically to a wavelength range of 450 to 750 nm (for example, Wyatt CL 1991), although the definition of that range varies (for example, http://hyperphysics.phy-astr.gsu.edu/hbase/vision/specol.html#c1). According to the latter definition, the major colors are assigned the following wavelength subbands:

• violet: 380-435 nm
• blue: 435-500 nm
• cyan: 500-520 nm
• green: 520-565 nm
• yellow: 565-590 nm
• orange: 590-625 nm
• red: 625-740 nm