Just as a car starts to accelerate from rest with acceleration , a bus,
which tire has gone flat slows down at a
rate of . The velocity of the
bus as it passes the car in a parallel lane is
vibus. (a) How long before the
car overtakes the bus? (b) What is the
velocity of the car, when the bus comes to
rest?

i don't know that i agree with that but what's the question ?

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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