00:01
To calculate the orbital angular momentum, we need to first find the momentum number, the quantum number.
00:06
So for part a, the 4d state, the d value gives us the angular momentum quantum number l, since d is associated with the l equals 2.
00:15
So to calculate the orbital angular momentum, we're going to use the fact that l, capital l, the orbital angular momentum, is equal to the square root of l times l plus 1.
00:26
So we're just going to replace that l value with 2, multiplied by 8 .3.
00:30
H -bar.
00:32
So you could use the electron volt -second version of h -bar or the jewel -second version of h -bar.
00:37
We're going to use jule -second.
00:38
So h -bar, you can look this up, is equal to 1 .054 times 10 to the minus 34 -jewel seconds.
00:44
So plugging those values in, we find that l is equal to the square root of 2.
00:49
I wrote 2 plus 2.
00:51
This l -plus 2...