00:01
And this class, you look at electron in an infinite way of lens air, right? you know that the energy level for such electron is given by e .n equals h bar squared over 2m times pere squared over air squared times n squared.
00:16
And n goes from 1, 2, 3, and so on.
00:22
N actually gives you the number of nodes of the wave function.
00:26
The wind function in general is same n squared over 2 over l, sine.
00:32
M pi over a l times, let's say x, right? so obviously, the n, the integer n actually gives you the number of nodes in the wave function.
00:42
So you see that there are three, actually, the number of, i mean, n plus one, actually, n plus one gives the number of nerds of the wave function.
00:50
You have four nodes, so n equals three, right? so this is actually a level, now n equals three.
00:55
And now you set n equal three in this.
00:58
So in other words, e3 equals, edge bar squared over 2m, 9 pi squared, and over l squared...