An 800-MW Laser Beam Emits a Cylindrical Beam of Single-Wavelength Sinusoidal

question 58

Multiple Choice

An 8.00-mW laser beam emits a cylindrical beam of single-wavelength sinusoidal light 0.600 mm in diameter.What is the maximum value of the magnetic field in the laser beam? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²,μ₀ = 4π × 10^-7 T ∙ m/A,c = 3.0 × 10⁸ m/s)

• A)9.24 µT
• B)17.2 µT
• C)12.4 µT
• D)20.5 µT
• E)15.4 µT

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