Why STOP lights are actually red 🚦
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Why STOP lights are actually red 🚦
Why are traffic lights red all over the world? You might think it's just because red is a universal symbol for danger, but the real reason is grounded entirely in physics! It all comes down to how light travels through the atmosphere, a process called Rayleigh scattering. Visible light travels in waves. Colors like blue and green have very ...
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