A point source of electromagnetic waves emits waves
A point source of electromagnetic waves emits waves uniformly in all directions. At a distance of 10.0 m from the source the magnetic field amplitude for the waves is 4.0 x 10^-8 T.
What is the power output of the source?
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a point source of electromagnetic waves emits waves uniformly in all directions at a distance of 100 m from the source
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an object is placed 100 cm in front of a diverging lens of focal length -25 cm a converging lens of focal length
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