why red is used in traffic lights? - letsdiskuss
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why red is used in traffic lights?


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The wavelength of red lights is higher than any other colour and also it is minimum scattered by atmospheric particles that is why red lights are used in traffic signals. If we see in Vibgyor the r red is in last which also means red colour has highest wavelength.Red lights are seen from very far when we are driving a vehicle red colour seen clearly to stop anything  people use red colour.

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