Question

why red color is a sign of danger​

Answer 1

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.

Answer 2

Answer:

Out of the seven primary colors, red colour has the longest wave length. So, it scatters the least in the atmosphere and can travel the most. Hence, red colour is used as a sign of danger as it can be seen from a long distance.

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