The helium-neon lasers most commonly used in student


The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW.

(a) If such a laser beam is projected onto a circular spot 2.10 mm in diameter, what is its intensity?

(b) Find the peak magnetic field strength.

(c) Find the peak electric field strength.

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Physics: The helium-neon lasers most commonly used in student
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