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13 years ago
An 8.000-mW laser beam emits a cylindrical beam of light 0.9000 mm in diameter. What is the rms value of the electric field in this beam?
A) 2176 N/C
B) 1000 N/C
C) 1088 N/C
D) 4122 N/C
E) 2000 N/C
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#1
13 years ago
A
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