Question

why is red light used as a sign of danger​

Answer 1

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. ... So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.

Explanation:

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Answer 2

Explanation:

. When the light passes through atmosphere, it gets scattered by small air particles. The scattering of light is inversely proportional to the fourth power of its wavelength. As the red light has the highest wavelength among all the colours, so it is scattered the least. Due to which most of the light gets reflected back and can travel longer distances through rain, fog, dust etc. to reach our eyes effectively..