red light is usedin traffic signal for stopping vechils . why
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The primary reason why the color redis used for danger signals is that red light is scattered the least by air molecules.The reason behind the scattering can be explained by Rayleigh scattering. The effect of scattering is inversely related to the fourth power of the wavelength of a color.
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bcoz of its wavelength.. that means it is clearly visible up-to far than yellow and green
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