2. an object experiences an acceleration, g, when it is on the surface of a planet of radius r. what will be
the acceleration on the object after it has been moved to a distance of 4r from the center of the planet?
a) 16g
b) 4g
c) 1/4 g
d) 1/16g

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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