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  2. en.wikipedia.org › wiki › UltravioletUltraviolet - Wikipedia

    5 天前 · Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...

  3. en.wikipedia.org › wiki › Incandescent_light_bulbIncandescent light bulb - Wikipedia

    2 天前 · Incandescent light bulb. A 230-volt incandescent light bulb with a medium-sized E27 (Edison 27 mm) male screw base. The filament is visible as the mostly horizontal line between the vertical supply wires. A scanning electron microscope image of the tungsten filament of an incandescent light bulb. Elaborate light in Denver, Colorado.

  4. en.wikipedia.org › wiki › Nuremberg_trialsNuremberg trials - Wikipedia

    5 天前 · The Nuremberg trials were held by the Allies against representatives of the defeated Nazi Germany for plotting and carrying out invasions of other countries across Europe and atrocities against their citizens in World War II . Between 1933 and 1945, Nazi Germany invaded many countries across Europe, inflicting 27 million deaths in the Soviet ...

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