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A plane wave front of electromagnetic fi...

A plane wave front of electromagnetic field is travelling with a speed `c in + z` direction. `vec B and vec E` are transverse to each other and uniform throughout the left of the wave-front and zero on the right of the wave-front. Then

A

`E = B/c`

B

`E = cB`

C

`E = (cB)/2`

D

`E = 2cB`.

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