The magnitude of the electric field of an electromagnetic waveincreases from 315

Question

The magnitude of the electric field of an electromagnetic waveincreases from 315 to 935 N/C. (a) Determine thewave intensities for the two balues of the electric field.(b) What is tthe magnitude of the magnetic fieldassociated with each electric field? (c) Dterminethe wave intensity for each vaule of the magnetic field. Please Help The magnitude of the electric field of an electromagnetic waveincreases from 315 to 935 N/C. (a) Determine thewave intensities for the two balues of the electric field.(b) What is tthe magnitude of the magnetic fieldassociated with each electric field? (c) Dterminethe wave intensity for each vaule of the magnetic field. Please Help

Explanation / Answer

a) I1 = E / o c  = 315 / 4 x 10-7 * 3 x 108 = 315/ 12.56 * 30 = 0.8359 W/m2       I2 = E /o c   = 935 / 4 x 10-7* 3 x 108 = 935 / 12.56 * 30 = 2.481W/m2 b) B = E / c = 315 / 3 x 108 = 1.05 x10-6 T B = E / c = 935 / 3 x 108 =3.11 x 10-6 T c) I = B2 c / o = (1.05 x10-6 )2 * 3 x 108 / 4 x10-7 = 263.33 W/m2      I = B2 c / o =(3.11 x 10-6 )2 * 3 x 108 /4 x 10-7 = 2310.1 W/m2

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