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10 Nov 2019
1.The radio telescope in Arecibo, Puerto Rico has a diameter of 300m, and is able to detect radio signals with a power of as little as6ΓΒ10-22 W. If the alien inhabitants of a planet 100 light-yearsaway are trying to contact us, what is the minimum power theirtransmitter must have if its signal is to be detectable at Arecibo?Assume that the aliens transmit omnidirectionally. State youranswer to two significant digits.
---I think I am doing something wrong with the intensity formulabecause it keeps telling me I am getting it wrong.
1.The radio telescope in Arecibo, Puerto Rico has a diameter of 300m, and is able to detect radio signals with a power of as little as6ΓΒ10-22 W. If the alien inhabitants of a planet 100 light-yearsaway are trying to contact us, what is the minimum power theirtransmitter must have if its signal is to be detectable at Arecibo?Assume that the aliens transmit omnidirectionally. State youranswer to two significant digits.
---I think I am doing something wrong with the intensity formulabecause it keeps telling me I am getting it wrong.
Trinidad TremblayLv2
21 Mar 2019
