Multiple choice

Why does the sky look blue?

  1. Sky is actually blue in colour.

  2. Sky is the reflection of sea water that is why it is blue.

  3. Blue colour of light is of short wave length so can be scattered by dust particles and water vapours but not the other colours.

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rayleigh scattering explains that shorter wavelengths of light (blue and violet) are scattered more efficiently by the atmosphere's molecules and particles than longer wavelengths (red). This scattered blue light reaches our eyes from all directions in the sky.

Keep practicing — related questions