00:02
Okay, so first, we know we eventually want to know energy.
00:08
So energy is place constant times frequency.
00:25
But we don't know what the frequency is at the moment.
00:28
So what we want to do is we also know frequency is the speed of light in a vacuum over a wavelength.
00:36
And we know our wavelength is 242 nanometers, which if we convert that to meters, by saying there's 10 to the minus 9 meters and one nanometer.
00:55
There are nanometers cancel, and we get 242 times 10 to the minus 9 meters.
01:03
So this is our wavelength that we want to put in here.
01:07
So then if we do that, we already know the speed of light in a vacuum, because it's 3 times 10 to 8 meters per second.
01:16
And we want to plug in this wavelength here.
01:19
So that's 242 times 10 to the minus 9 meters.
01:25
So whenever we divide this, we end up getting a frequency of 1 .24 times 10 to the 15th seconds to the minus 1.
01:42
So now we have frequency, we can go back over here and put it into this formula...