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A red light is used in traffic signals because

(a) It is visible to people even with bad eyesight.
(b) It looks beautiful
(c) It has the longest wavelength and can be seen from a long distance.
(d) None of the above

Anurag Mishra Professor Asked on 2nd May 2016 in General Knowledge.
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4 Answer(s)

(c)

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Shivani Default Answered on 4th May 2016.
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(C)

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Shivani Default Answered on 4th May 2016.
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c

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sushil Default Answered on 4th May 2016.
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Answer: (c) It has been the longest  wavelength and can be seen from a long distance. 

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Anurag Mishra Professor Answered on 5th July 2016.
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