Light from a Laser Forms a 1

question 43

Multiple Choice

Light from a laser forms a 1.31 mm diameter spot on a wall.If the light intensity in the spot is 3.69 x 10⁴ W/m²,what is the power output of the laser?

• A)49.7 mW
• B)30.8 mW
• C)41.7 mW
• D)57.7 mW

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Definitions:

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