SSC JE Civil Engineering 29-Oct-2020 Shift 1 Paper

Question : 155 of 200

Marks: +1, -0

Red light is used as signal for stop as it is visible from greater distances than other colours because of its:

high frequency and small wavelength compared to any other colour on visible spectrum
longest wavelength and high frequency compared to any other colour on visible spectrum
longest wavelength and low frequency compared to any other colour on visible spectrum
smallest wavelength and low frequency compared to any other colour on visible spectrum

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