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.
The ozone layer and its effect on ultraviolet light. The Earth is surrounded by a thick atmosphere which provides us with the air we beathe, keeps the planet warm and also protects us from harmful radiation from space. One of the most important types of damaging radiation is ultra violet radiation from the Sun. The part of the atmosphere that filters out a lot of the ultra violet radiation is called the ozone layer â a region of the atmosphere between about 15 and 40 km above the Earth's surface. The ultra violet radiation from the Sun is divided into three regions depending on the wavelength of the radiation.