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Why Are the 'Danger Signal' Lights Red in Colour? - Science

Why are the 'danger signal' lights red in colour?

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Solution

Danger signal lights are red because this colour has the longest wavelength among all the colours. Also, it is the least scattered by fog, dust and smoke particles. This makes red light visible even from a longer distance.

 

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Lakhmir Singh Class 10 Physics (Science)
Chapter 6 The Human Eyes And The Colorful World
Q 13 | Page 298
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