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Multiple-Concept Example 5 discusses the principles used in this problem. A neodymium-
glass laser emits short pulses of high-intensity electromagnetic waves. The electric field
of such a wave has an rms value of Erms = 1.8 x 10' N/C. Find the average power of each
pulse that passes through a 2.2 × 105-m2 surface that is perpendicular to the laser beam.

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