Multiple choice

Why is red light used in traffic signal for stopping the vehicles?

  1. It is visible even to longsighted people.

  2. Eye is more sensitive to red light.

  3. It is least scattered and hence can be easily noticed from long distance.

  4. It is very pleasant to the eye.

  5. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White light is made up of 7 colors. Red colour, due to its longer wavelength does not get scattered by the particles in the atmosphere n hence reaches our eyes more distinctly than the other colors minus much scattering. Green gets scatterd more red but less than blue, which r d basic colours. Hence, red is used 4 stop n danger while green if for GO!</span>.</p>.

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