Why Is The Sky Blue?
3. Molecules
It used to be thought that dust in the atmosphere was responsible for the light scattering as it does. This didn’t quite add up, however, because dust in the atmosphere would likely have led to more variation in the colors that we see. In 1911, it was confirmed that it was not dust that’s responsible, but molecules of gas.
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The person who finally confirmed the truth of the matter was no other than the famous genius, Alfred Einstein. The gas molecules responsible are nitrogen, the most common gas in our atmosphere, and oxygen. Regardless, some people still make the mistake of claiming the phenomenon is caused by particles.
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