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

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. If such a laser beam is projected onto a circular spot 2.617 mm in diameter, what is its intensity?

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wen Intensity, I = Power = for P= 0.250 mW = 0.250X103 W, r= 2.617 mm 2 P= 2.617x10-3 m I = 0.250X10-3w IT x 2.617 X10*3m)? I

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