A gas at 50°C has a volume of 50 mL. If I increase the
temperature to 80°C what will its volume be?
1,/T, = 1';/T.
50mL/50C = V/80C Vi=80ml

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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the doppler effect is used by weather forecasters to measure 

moving clouds