Physics, 15.04.2020 21:23 elarracadas22

A Cassegrain telescope has a hole in the main mirror. This reduces the mirror area and thus the light gathering power, but how much? Suppose a ten inch diameter mirror has a one inch diameter hole in the center. How much of the light gathering power is lost because of the hole?

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A Cassegrain telescope has a hole in the main mirror. This reduces the mirror area and thus the ligh...