A high flying jet cruises at an altitude of 30,000 feet at a constant velocity of 700 km/h. The force of the jet engines is 40,000 N. How much
air drag acts on the jet? *

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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