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.
Ultraviolet Radiation, electromagnetic radiation that has wavelengths in the range between 400 nm, the wavelength of violet light, and 15 nm, the length of X rays. (The nanometre, nm, equals a millionth of a millimetre, or 40 billionths of an inch.) Ultraviolet radiation is produced artificially by electric arc lamps.