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6 problems. P1: 'Speed of EM waves: c = 1/√(μ₀ε₀) = 1/√(4π×10⁻⁷ × 8.85×10⁻¹²) = ___ m/s' (3×10⁸). P2: 'For a plane EM wave: if E₀ = 300 V/m, then B₀ = E₀/c = ___ T' (10⁻⁶ T = 1 μT). P3: 'Energy density in EM wave: u = ε₀E² = E²/(μ₀c²). For E₀=300 V/m: u_avg = ε₀E₀²/2 = ___ J/m³' (4×10⁻⁷). P4: 'Inten

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