Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 2.5 MW. What is the intensity of the transmitted signal reaching a nearby star that is 44 ly away. (An alien civilization at that distance might be able to watch X Files.) A light-year (ly) is the distance light travels in one year. Number Units
Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 2.5 MW. What is the intensity of the transmitted signal reaching a nearby star that is 44 ly away. (An alien civilization at that distance might be able to watch X Files.) A light-year (ly) is the distance light travels in one year. Number Units
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