The electric vector vibration of an electromagnetic wave is given by

The Electric Vector Vibration Of An Electromagnetic Wave Is Given Physics QuestionThe Electric Vector Vibration Of An Electromagnetic Wave Is Given Physics Question

The electric vector vibration of an electromagnetic wave is given by E=(50 NC⁻1) sin ω(t-x/c). The intensity of the wave is

Options

(a) 2.3 Wm⁻²
(b) 4.3 Wm⁻²
(c) 3.3 Wm⁻²
(d) 1.8 Wm⁻²

Correct Answer:

3.3 Wm⁻²

Explanation:

The Intensity is, I = (1/2) ε₀E₀²c

I = (1/2) × (8.85 × 10⁻¹² N-m²C⁻²) × (50 NC⁻¹)² × 3 × 10⁸ ms⁻¹

I = 3.3 Wm⁻²

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