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hungry22 hungry22
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2 months ago

A 20 W laser beam, with an initial diameter of 2.0 mm, spreads out to a diameter of 2.0 m after traveling 10,000 m. What is the initial intensity of the beam?



20 × 106 W/m2



6.4 × 106 W/m2



3.2 × 106 W/m2



2.0 × 105 W/m2



1.0 × 105 W/m2

Textbook 
College Physics

College Physics


Edition: 5th
Author:
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mr.pogimr.pogi
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2 months ago
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hungry22 Author
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2 months ago
Good timing, thanks!
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Yesterday
Thank you, thank you, thank you!
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2 hours ago
Thanks
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