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Physics, 23.10.2021 22:40 nocomprendoplshelp
An isotropic antenna is designed to receive signals around 2.4 GHz. It is used near the surface of the Earth, which is at 290 degrees K. On a cloudless night, the sky appears to be about 3 degrees K, due to the cosmic microwave background radiation. What is the equivalent noise temperature of the antenna
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