00:01
Alright, so let's say we have a soap film where the index of refraction is 1 .5 and it has a thickness of 910 nanometers.
00:11
So we want to know what wavelengths are missing in the reflected light.
00:16
So for this condition, what we'll have is 2 times n times t is equal to some multiple of the wavelength for destructive interference and no phase change.
00:26
Alright, so let's...
00:28
So, lambda is just going to be 2 times n times t over m, and so like, you know, m equals 1 corresponds to...
00:37
Alright, so, you know, 2730 nanometers and then lambda 2 is going to be half that number, so 1365 nanometers.
00:49
Lambda 3 is going to be, of course, 910 nanometers...