A star is observed to have a temperature of 3000 K and a luminosity of 105. What is the color of the star? What group does the star belong to?.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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what is the actual question though?

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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