Aglass flask whose volume is 1000 cm3 at a temperature of 1.00 ∘c is completely filled with mercury at the same temperature. when the flask and mercury are warmed together to a temperature of 52.0 ∘c , a volume of 8.45 cm3 of mercury overflows the flask.

answer; /// i believe that the correct answer is (c)

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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