Japanese intelligence about American productive potential was about as limited as German knowledge of the Soviet Union. In Tokyoâs view, if Japanese naval forces took out the American Pacific carriers at Pearl Harbor, there was simply no way for America, at least in the immediate future, to contradict any of their Pacific agendas.
Ultraviolet (UV) is an electromagnetic radiation with a wavelength from 10 nm (30 PHz) to 400 nm (750 THz), shorter than that of visible light but longer than X-rays. UV radiation constitutes about 10% of the total light output of the Sun, and is thus present in sunlight.
Princeton's WordNet(4.00 / 5 votes)Rate this definition: 1  ultraviolet, ultraviolet radiation, ultraviolet light, ultraviolet illumination, UV(adj) radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays. ultraviolet(adj) having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end.