Aspaceship moving toward earth with a speed of 0.85c launches a probe in the backward direction with a speed of 0.12c relative to the ship. find the speed of the probe relative to earth.

the answer is b ) square root of 5

50 inches should be the resultant vector

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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