The clear daytime sky looks blue mainly because

air molecules scatter blue light much more than red lightCorrect answerYour answerthe sea reflects its colour onto the skyCorrect answerYour answersunlight undergoes total internal reflection in the airCorrect answerYour answerthe ozone layer is blue in colourCorrect answerYour answer

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CorrectNot quiteAnswer A

Correct answer: A

Tiny air molecules scatter short wavelengths far more strongly than long ones.
Blue light, with a short wavelength, is scattered across the whole sky and reaches our eyes from every direction.

Worth noting

The same scattering makes the Sun look red at sunrise and sunset, when its light crosses more air and loses its blue.

Concept: Scattering of light
Typical timeTypical: 35 s
Your timeYours: —

The rule this testsLight

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The clear daytime sky looks blue mainly because

Explanation