What is the primary reason for using red light in traffic signals?

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Physics · Optics

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Red light has a longer wavelength, so it scatters less and can be identified from a farther distance.

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Answer 1

It has the highest frequency among visible lights.

Answer 2

It can be easily identified by people with all types of color blindness.

Answer 3

Red light has a longer wavelength, so it scatters less and can be identified from a farther distance.

Answer 4

It is visually more attractive.

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