- #1

heycoa

- 75

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## 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.

## Homework Equations

Irradiance = c*ε

_{0}/2 * E

_{0}

^{2}

## The Attempt at a Solution

If I solve for E

_{0}, I end up with: 4.47*10

^{11}V/m

^{2}. 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 E

_{0}. Is this correct?