What would happen if danger signals were blue in colour? Justify your answer with the help of the phenomenon involved.
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Answer:
Danger signals are red in color because it is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. Since the color red has the highest wavelength of all the colors we can see it scattered the least. So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.
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Explanation:
The wavelength of blue colour is short, so it will be easily scattered by the atmospheric particles. As a result, unlike red colour, we won't be able to see the danger sign from a distance.
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