A car with mass 50kg falls freely from rest through a height of 100m and come to rest having penetrated 5.0cm into the ground A calculate the time taken to fall B calculate the velocity when the body strikes the ground

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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