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The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible.
All high clouds are a type of cirrus, a common cloud that can be seen at any time of the year.
In a cloud sunlight is scattered equally meaning that the sunlight continues to remain white and giving clouds their distinctive white appearance.
Clear winter days are a glorious time to cycle, but its best to head out with a few precautions.
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