Physics Practice Problems Energy Carried by Electromagnetic Waves Practice Problems Solution: The energy flow per unit time per unit area (S) of...

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Solution: The energy flow per unit time per unit area (S) of an electromagnetic wave has an average value of 695 mW/m2. The wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. The total energy that traverses the area in a time interval of one minute is closest to: A) 130 J B) 250 J C) 160 J D) 220 J E) 190 J

Problem

The energy flow per unit time per unit area (S) of an electromagnetic wave has an average value of 695 mW/m2. The wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. The total energy that traverses the area in a time interval of one minute is closest to:

A) 130 J

B) 250 J

C) 160 J

D) 220 J

E) 190 J