Aparticle traveling around a circle at constant speed will not experience an acceleration. true or false

False

Explanation: To explain this we have to consider that if the particle experiences change in a direcction of the velocity , which is characteristic in a circular movement, it need an acceletarion to describe the circular trajectory.

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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