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physics problem A spherical ball has a surface charge o. Consider a time interval T over which the ball radius R increases first linearly with

physics problem

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A spherical ball has a surface charge o. Consider a time interval T over which the ball radius R increases first linearly with time according to R = at and then again linearly, but with R = bt. It takes time A to change the regime from R = at to R = bt. Find the width of the electromagnetic wave packet generated during the time interval T. (0.5p)

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