The New England Merchants Bank Building in Boston is 152 m high. On windy days it sways with a frequency of 0.16 Hz , and the acceleration of the top of the building can reach 1.8 % of the free-fall acceleration, enough to cause discomfort for occupants.

what is the question because that is not a 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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