A laser with a power of 1.0 mW has a beam radius of 1.0 mm.What is the peak value of the electric field in that beam? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T • m/A, A) 490 V/m B) 840 V/m C) 65 V/m D) 120 V/m E) 22 V/m

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The Answer of A laser with a power of 1.0 mW has a beam radius of 1.0 mm.What is the peak value of the electric field in that beam? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T • m/A, A) 490 V/m B) 840 V/m C) 65 V/m D) 120 V/m E) 22 V/m

A Laser with a Power of 1