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Q.

Is it true that signal lights are red due to the least scattering of red colour?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
Red has the longest wavelength, which is why signal lights are red. The longer the wavelength, the less it will be scattered. Because red light scatters the least, it can easily pass through fog, mist, or smoke. In addition, it can be seen from a long distance away. As a result, it is used as a universal danger signal.
 
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