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Circular apertures are often involved in the transmissio of EM waves over long distances. Discuss how this would affect communications to the moon from a circular radio antenna such as Morehead State's 21m diameter satellite tracking antenna operating at a radio wave frequency of 7139.5 MHz. What would happen to the signal beam and why might it matter? You may need to look up the distance to the moon. Please include some calculations in your discussion.

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