00:01
Okay, so we want to calculate the frequency in wave numbers and then the wavelength of the first rotational transition, which equals 0 to 1 for d35cl.
00:15
So this one isn't too bad, because all you have to do is plug it into the formula, which says that the wave number equals 2 times b tilde times j, and that just equals h over 4 pi squared c times i, since, of course, j equals 1.
00:40
Now, the moment of inertia, this is a value that you can look up, and if you do that, all that you have to do is plug it in, which is 6 .626 times 10 to the negative 34 joules times second, because that's planck's constant, over 4 pi times the speed of light, which is 3 .0 times 10 to the 8th meters per second, and then look at that moment of inertia, which is that i value, which for this case is 5 .14 times 10 to the negative 47.
01:13
Plug that in your calculator and you get an answer of about 1089.
01:18
But be careful, this is going to be an si unit, so you're going to get a per meter...