A plane electromagnetic wave of wavelength 3.0 ~m travels in vaccum along the positive X -axis. The electric field of amplitude 300 Vm ⁻¹ oscillates parallel to the Y-axis. Then the intensity of the wave is ( ₀=4 10⁻⁷ Hm ⁻¹, c =3 10^8 ~ms ⁻

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A plane electromagnetic wave of wavelength 3.0 ~m travels in vaccum along the positive X -axis. The electric field of amplitude 300 Vm ⁻¹ oscillates parallel to the Y-axis. Then the intensity of the wave is ( ₀=4 10⁻⁷ Hm ⁻¹, c =3 10^8 ~ms ⁻¹ )

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Correct answer: A. 119.4 Wm ⁻²

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A plane electromagnetic wave of wavelength 3.0 ~m travels in vaccum along the positive X -axis. The electric field of amplitude 300 Vm ⁻¹ oscillates parallel to the Y-axis. Then the intensity of the wave is ( ₀=4 10⁻⁷ Hm ⁻¹, c =3 10^8 ~ms ⁻¹ )

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