Question: A point source emits light evenly in all directions at wavelength of 650 nm at rate of 70 W. A light detector is positioned

A point source emits light evenly in all directions at wavelength of

A point source emits light evenly in all directions at wavelength of 650 nm at rate of 70 W. A light detector is positioned 700 km from the source. What is the maximum rate OB/Ot (in T/s) at which the magnetic component of the light changes with time at the detector's locations?

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