SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Car window transparency gauge. Traffic police officer using a measuring gauge to check the transparency levels of tinted car windows. This test is being carried out in Russia, where federal safety standards require 75 percent transparency for the windscreen, and 70 percent transparency for the front side windows. The gauge is showing a reading of 68.1 percent. Photographed in 2007, in Moscow, Russia.
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