00:02
Hi there.
00:03
In this question, we are given a wavelength and we need to know the frequency.
00:08
Well, to answer this, we can use the equation that tells us that for any member of the electromagnetic spectrum, the wavelength multiplied times the frequency is equal to the speed of light.
00:23
Well, we're trying to solve for wavelength here.
00:26
I'm sorry, we're trying to solve for frequency.
00:28
So i'm going to go ahead and rearrange this equation by dividing each side by wavelength.
00:34
Therefore, frequency is equal to the speed of light divided by the wavelength.
00:41
So the speed of light is 3 .00 times 10 to the 8th meters per second.
00:53
Our wavelength here, we are told, is 656 nanometers.
01:01
All right, well that's a little bit of a problem because we see unit -wise that speed of light is in meters, while this is in nanometers...