The magnetic field of a plane electromagnetic wave is B → = 3 × 10 - 8 sin 200 π ( y + c t ) i ^ T . Where, c = 3 × 10 8 m s - 1 is the speed of light the corresponding electric filed is :

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E 0 = c B 0 ∴ E → × B → ‖ C → ⇒ k ^ × i ^ = j ^ E → = 3 × 10 8 × 3 × 10 - 8 sin [ 200 π y + ct ( - k ^ ) = 9 sin [ 200 π y + ct ] ( - k ^ )

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