Pеople often bothered in in discovering that reflecting telescopes have a reflecting mirror are (a) (10 points) in a cassegrain focus, what fraction of light do you lose if the primary mirror is 8 m in diameter and the secondary 1 m? (b) eaplain why this might be worth the reflecting telescope design

compass can be used day and night, cloudy or sunny

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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