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You walk in a circle of radius 1.20 km around the midpoint
of a pair of identical radio antennas that are 8.00 m apart. The intensity
decreases continuously from 0.0540 W>m2 in the direction u = 0 to 0.0303 W/m2 in the direction u = 6.00. Find (a) the wavelength of the
radio waves and (b) the intensity in the direction u = 12.0.

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