Scientist have been able to determine the composition of earth's layers by: a) studying photographs taken from satellites. b) drilling down and bringing up samples to study. c) shooting x-rays into the planet. d) making inferences based on data from seismic waves.

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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