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A low-power laser used in a physics lab might have a power of 0.60 mW and...

A low-power laser used in a physics lab might have a power of 0.60 mW and a beam diameter of 2.3 mm .

Calculate the average light intensity of the laser beam.: Ans: 140 W/m^2

Compare it to the intensity of a lightbulb emitting 25 W of light viewed from a distance of 2.0 m----- I got 0.497 but it is wrong

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