Question
A $3.00-\mathrm{kW}$ carbon dioxide laser is used in laser welding. If the beam is $1.00 \mathrm{~mm}$ in diameter, what is the amplitude of the electric field in the beam?
Step 1
Step 1: We know that the intensity $I$ is given by $\frac{1}{2} \mu_0 c E_0^2$, where $\mu_0$ is the permeability of free space, $c$ is the speed of light, and $E_0$ is the amplitude of the electric field. Show more…
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