Question

Why are danger signals red in colour ?

Answer 1

Answer:

Danger signal lights are red in colour because the red coloured light having longer wavelength is scattered the least by fog or smoke.Therefore,it can be seen clearly from a distance.

Answer 2

Answer:

Danger signals light are red in colour because the red coloured light having longer wavelength is scattered the least by fog. So it can be used for danger signals.

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