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
Correct Answer:
Verified
Correct Answer:
Verified
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