00:01
In this question, we have to find the wavelengths for a few different electrical waves given that we know.
00:06
So part a, we know that we have a 100 megahertz radio wave, and we also know that c, the speed of light, is equal to our wavelengths multiplied by our frequency, and we know the value of the speed of light as well.
00:20
That's 3 times 10 to the 8.
00:23
So if we want to find the wavelength with this particular light, let's first convert our frequency into hertz.
00:28
That's going to be 10 to the 8, since mega is 6.
00:31
We have 100 megahertz, then we're going to take our speed of light and we're going to divide it by the frequency that we just found.
00:38
And we do that out, we find that the answer to part a is three meters.
00:43
For part b, we do the same process...