2 1 3 1 7 which is our final cumulative frequency. Our list was 3 3 5 6 6 6 8. You can calculate the energy of an electromagnetic wave by using the fact that the electromagnetic field carries an energy density in the amount u ϵ 0 2 E 2 1 2 m 0 B 2 In a linearly polarized plane wave E and B oscillate sinusoidally.
Count the number of data points.
The average value of a squared sine function is simply half the square of the maximum amplitude so. Working with grouped data. The formula for. Our list was 3 3 5 6 6 6 8.