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One radio transmitter A operating 60.0MH...

One radio transmitter A operating `60.0MHz`is `10.0`from another similar transmitter `B` that is `180^(@)` out of phase with transmitter`A`.How far must be observer move from transmitter A towards transmitter B along the line connencting A andB to reach the nearest point when the two beam are in phase?

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[1.25m]
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