Multiple choice

The blue colour of the sky is due to

  1. reflection of light

  2. scattering of light

  3. collection of light

  4. gas

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

The sky appears blue due to Rayleigh scattering - sunlight interacts with gas molecules in the atmosphere, and shorter blue wavelengths scatter more than other colors. Option B is correct. This is different from reflection (option A).