1point
two people are paddling a canoe downstream with a speed of 4 km/h relative
to the river. if the river is flowing at 17 km/h, how long will it take them to
reach the canoe dock 25km away?
o a. 1.5 h
o b. 1.9 h
o c. 1.26
o d. 0.8 h

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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