Q 35

A 7.5 × 1014 Hz laser emits a 7.7-μs pulse, 5.0 mm in diameter, with a beam energy density of 0.51 J/m3. What is the amplitude of the electric field of the emitted waves? (c = 3.00 × 108 m/s, μ0 = 4π × 10-7 T ∙ m/A, ε0 = 8.85 × 10-12 C2/N ∙ m2) A) 340 kV/m B) 480 kV/m C) 240 kV/m D) 150 kV/m E) 120 kV/m

Multiple Choice