what color does acid turn red litmus papera substance tested with blue litmus paper, is clear and colorless, and feels slippery. What can you determine about this substance

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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option number c is the right answer.