00:02
We're going to start by writing the wave function down, and we note that this is only valid for the interval 0 to l.
00:11
So, x lies along the interval from 0 to l.
00:16
The wave function is zero elsewhere.
00:19
So another thing we're going to start with is normally you would write the integral that we're going to use from minus infinity to infinity.
00:30
But note once again that since the wave function is zero elsewhere outside of this interval, we can go ahead and change this integral to have limits from zero to l.
00:42
So let's go ahead and do that, and then we will continue.
00:47
It's always important to note your limits of integration.
00:52
So we go ahead and place the square of the wave function right here, and this is true for any value of n where n is greater than zero.
01:04
It's a positive number, and it's an integer.
01:16
Also, we're going to set this integral equal to one.
01:20
So in evaluating this, we can pull the constant a square outside of the integral, and now it remains to just determine the integral itself.
01:31
So we have the integral of sine squared with the argument n pi x over l, and we're integrating with respect to x...