What is the area of a circle of radius 28.77 m ? Express your answer using four significant figures and include the appropriate units.

Explanation:

Area of a circle = pi x r x r = 3.14 x 28.77 x 28.77 = 2600.33677 ~ 2600 (using 4 significant figures)

wavelength divides in half and speed stays the same.

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.

hope this ! this is not copied! search it up, it's free of plagiarism!