00:01
Question number 44 is asking us to calculate the wavelength of gravitational waves, which are produced either by two colliding black holes or the product of supernovas.
00:12
Now, we know the frequency of these gravitational waves that's given to us in the problem as 10 hertz.
00:22
Now, the way in which frequency and wavelength are related is that their product is the speed of light.
00:30
C is equal to lambda times f, or lambda is the wavelength, and f is frequency, as we just mentioned.
00:41
Now, with the speed of light is a constant, that c is equal to 3 times 10 to the 8th meters per second.
00:54
So, we know two of the values in this problem.
00:57
We just need to find wavelength.
00:58
And the way we can do that is just divide both sides by f, and we get c over f is equal to lambda.
01:09
Now, just plug in our values, and we get 3 times 10 to the 8 meters per second divided by 10 hertz...