Assume the amplitude of the electric field in a plane electromagnetic wave is E1 and the amplitude of the magnetic field is B1 The source of the wave is then adjusted so that the amplitude of the electric field doubles to become 2E1. i) what happens to the amplitude of the magnetic field in this process? a) it becomes 4 times larger? b) it becomes 2 times larger? c) it can stay constant d) it becomes 1/2 as large ? e) it becomes 1/4 as large? ii) What happens to the intensity of the wave? Choose from the same possibilities.

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Chapter1: Units, Trigonometry. And Vectors
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Assume the amplitude of the electric field in a plane electromagnetic wave is E1 and the amplitude of the magnetic field is B1 The source of the wave is then adjusted so that the amplitude of the electric field doubles to become 2E1.

i) what happens to the amplitude of the magnetic field in this process? a) it becomes 4 times larger? b) it becomes 2 times larger? c) it can stay constant d) it becomes 1/2 as large ? e) it becomes 1/4 as large?

ii) What happens to the intensity of the wave? Choose from the same possibilities.

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