Question

Why are the 'danger signal' lights red in colour?

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.Also red light has the longest wavelength.

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Answer 2

Answer:

danger signal lights red in colour because red have long wave length...so it do not deflect in different directions..and a driver can see it clearly and can notify..about the danger....

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