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The movement was born from the thought of Shimizu Hitoshi, an official at Sendenbu. Sendenbu was the Japanese propaganda department during World War II. The 3A movement is known for its slogan: "Japan the light of Asia, Japan the protector of Asia, Japan the leader of Asia," in Japanese 「亜細亜の光日本、亜細亜の母体日本 ...
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ...
v. t. e. The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
Aurora. An aurora[ a] ( pl. aurorae or auroras ), [ b] also commonly known as the northern lights ( aurora borealis) or southern lights ( aurora australis ), [ c] is a natural light display in Earth 's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic ).
Luminance. A tea light -type candle, imaged with a luminance camera; false colors indicate luminance levels per the bar on the right (cd/m 2) Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. [ 1] It describes the amount of light that passes through, is emitted from, or is ...
The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band. From low to high frequency these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and ...
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 ...
v. t. e. Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [ 1] Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the ...
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