00:01
Given with the frequency of an electromagnetic radiation such as radio wave, we solve for the wavelength as lambda equals c over f, where lambda is the wavelength in meters, c is the speed of the electromagnetic radiation, and f is the frequency in hertz.
00:20
In this problem, we're given with an am radio station that is constructed such that its antenna is pi over for high above the ground.
00:28
And if the frequency of the radio wave that is being broadcasted from this am station, am radio station is 820 khz, we want to find the height of the antenna.
00:42
So that will solve, that will involve solving first for the lambda.
00:49
That's the wavelength of the radio wave.
00:51
And you see in this requirement that the length of the antenna is one -fourth of the wavelength, then we will be able to solve.
00:58
The length or the height of the antenna...