Question

why red color light used for danger signal??? ​

Answer 1

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Answer 2

$\huge\bold\star\red{mr phenomenol}\star$


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.