The magnetic-field amplitude of an electromagnetic wave is B₀ = 6.0 × 10⁻⁷ T. The electric-field amplitude is:
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Question

The magnetic-field amplitude of an electromagnetic wave is B₀ = 6.0 × 10⁻⁷ T. The electric-field amplitude is:

G1 Physics · Accepted Answer

For an electromagnetic wave in vacuum, E₀ = cB₀ Given: B₀ = 6.0×10⁻⁷ T c = 3×10⁸ m s⁻¹ Therefore, E₀ = (3×10⁸)(6×10⁻⁷) = 18×10¹ = 180 V m⁻¹ Hence option D follows.