A Light Source Radiates 60

question 15

Multiple Choice

A light source radiates 60.0 W of single-wavelength sinusoidal light uniformly in all directions.What is the amplitude of the electric field of this light at a distance of 0.400 m from the bulb? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²,μ₀ = 4π × 10^-7 T ∙ m/A,c = 3.00 × 10⁸ m/s)

• A)162 N/C
• B)212 N/C
• C)82.1 N/C
• D)150 N/C
• E)52.9 N/C

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