Question

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m^2 . The wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. How much total electromagnetic energy falls on the area during 1.0 minute?

Answer 1

The total electromagnetic energy that falls on the rectangular area during 1.0 minute is 169.02 Joules.

Step-by-step explanation:

The total electromagnetic energy that falls on the rectangular area can be calculated using the formula:

Energy = Average Poynting vector * Area * Time

Given that the average Poynting vector is 0.939 W/m², the area is 1.5 m * 2.0 m = 3.0 m², and the time is 1.0 minute = 60 seconds, we can substitute these values into the formula:

Energy = 0.939 W/m² * 3.0 m² * 60 seconds = 169.02 Joules

Therefore, the total electromagnetic energy that falls on the rectangular area during 1.0 minute is 169.02 Joules.