00:01
As for the question, we need to find the magnitude of momentum of a particle in a box.
00:08
Now this box is one -dimensional that has length l in its nth state.
00:16
Ent -state.
00:19
So this is 0 to l for x -axis, just one -dimensional.
00:25
Now we know that potential vx will be equal to 0 and 0 is lesser than x which is lesser than l's.
00:34
This would be the equation.
00:36
Now here we can use the scrodinger equation according to which we know that minus h raised to the power minus 2 upon 2m d squared the wave function divided by d x square as equals to e into wave function.
00:52
This becomes d square wave function divided by d x square plus 2m e upon h raised to the power minus 2 into wave function is equal to 0.
01:04
Now say that this 2m .a upon h raised to the power minus 2 is equals to ka squared.
01:11
Consider this as k square.
01:12
For the solution that wave function x is equal a cos kx plus b sine k x.
01:23
Mark this is our equation number one and for this we will get that the wave function for 0 is equal to the similar for l...