Physicshard · Past Paper
Yellow light is used in sodium lamps for street lighting because:
AIt is the brightest color
BIt is not scattered much by fog/rain
CIt is cheapest to produce
DIt is most sensitive to human eye
✓ Correct Answer: B — It is not scattered much by fog/rain
Yellow light has a wavelength that is less scattered than blue/green, providing better visibility in bad weather.
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