The distance between the first and the third nodes of a standing wave is O.1 m, its maximum displacement is O.04 m and its frequency is 160 Hz. The wave- functions of the two travelling waves which interfere to give the standing wave are then: O y1 = 0.04 sin(20Tx-320tt); y2 =0.04 sin(20rx+320rtt), O y1 = 0.002 sin(20x-320t); y2 = 0.02 sin(20tx+320t), y1 = 0.005 sin(5rtx-40rt);y2 = 0.005 sin(5rx+40nt), %3D O y1 = 0.01 sin(10Tx-80nt) ; y2 = 0.01 sin(10x+80nt), y1 = 0.01 sin(5rx-40Tt); y2 = 0.01 sin(5rx+40nt).

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A:

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A:

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Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.