A helium$-$neon laser emits a $2\mathrm{.}0-$mmmm$-$diameter laser beam with a power of $1\mathrm{.}0$mWmW$.$

Part A

What is the amplitude of the electric field of the light wave?

Express your answer with the appropriate units.

View Available Hint$($s$)$for Part A

Hint $1$for Part A$.$ How to approach the problem

The intensity of a beam is related to power and the cross$-$sectional area. The amplitude of the electric field of a wave is related to the intensity of the beam.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

E$0$E$0=$

nothingnothing

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Part B

What is the amplitude of the magnetic field of the light wave?