Multiple choice

The blue colour of the sky is due to

  1. Refraction of light

  2. Diffraction of light

  3. Dispersion of light

  4. Scattering of light

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The blue color of the sky is caused by Rayleigh scattering, where shorter wavelengths of sunlight are scattered more efficiently by atmospheric gases than longer wavelengths.