Multiple choice general knowledge

A clear sky is blue because:

  1. red light is scattered more than blue.

  2. ultra violet light has been absorbed.

  3. blue light is scattered more than red.

  4. blue ight has been absorbed.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rayleigh scattering causes shorter wavelengths (blue) to scatter more than longer wavelengths (red). This is why the sky appears blue - blue light is scattered in all directions by atmospheric molecules. Red light passes through more directly, which is why sunsets appear red. Option A is incorrect because red light scatters LESS, not more. Option D contains a typo and states the opposite of what actually happens.

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