Why is danger signals red in colou?
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The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. ... So red light is able to travel the longest distance through fog, rain, and the alike.
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Because wave length of red colour is more than the other colours so that we can see danger light from very far.
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