A) light is most scattered by fog
B) has the longest wavelength among all colours
C) has the longest wavelength among all colours except red and orange but the red colour is already used for brake light and stop light whereas orange colour is avoided due to its similarity with red
D) has the shortest wavelength among all colours
Correct Answer: C
Solution :
Yellow colour is used as fog light because of its longest wavelength it 63.33 penetrates well through dense fog.
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