An instructor’s laser pointer produces a beam of light with a circular cross section of diameter 0.900 mm and a total power output of 4.50 mW. The beam size stays nearly constant when the instructor uses the laser pointer in the classroom. What is the amplitude E 0 of the electric field of the laser’s light?
Answers: 3
= 2309 V/M
and making S the subject of the formula; we have:
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An instructor’s laser pointer produces a beam of light with a circular cross section of diameter 0.9...
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