Ben is towing a caravan and finds that he cannot see the road behind him draw a way to help him using mirrors he cannot use mirrors any bigger than his wing mirrors

gas and liquid

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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