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Optics | Amplitude of Electric Field Given Radiant Flux Density

  • Thread starter heycoa
  • Start date
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1. Homework Statement
A laser provides pulses of EM radiation in vacuum lasting 7.47* 10-12 s. If the radiant flux
density is 2.65 * 1020 W/m2, determine the amplitude of the electric field (x *1011) of the beam. Units are required as listed in instructions.

2. Homework Equations
Irradiance = c*ε0/2 * E02


3. The Attempt at a Solution
If I solve for E0, I end up with: 4.47*1011 V/m2. My question is that I did not use the time that the question gave me. All I did was plug into the irradiance equation and solve for E0. Is this correct?
 

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