Why do we use red light for signals? what will happen if blue is used? – InterviewSolution

1.	Why do we use red light for signals? what will happen if blue is used?
Answer» Hey!! here is ur answer!! ============================= ✔️ We USE red light for signals because the wavelength of red light is LONGEST therefore the light of red colour scattered the least by the air Molecules of the atmosphere. ✔️ The light of red colour as compared to other colours LIKE BLUE can penetrate to a longer DISTANCE without becoming weak. ✔️ Hence red light is used for signals so that the signal may be visible from the far distance even in fog, etc.. ================================== hope this helps u!!

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