00:01
20th century found that they were not able to explain the behaviour of atoms using their knowledge of matter that they had at the time.
00:08
So they needed to develop a new view on matter and energy to accurately describe how exactly atoms behave.
00:14
So this is considered the theory of quantum theory or quantum mechanics.
00:19
And so here we're just looking at a brief calculation where we're considering the transition from n equals x to n equals 1.
00:28
So the energy of the initial state is equal to negative rh over x squared and ef is equal to negative rh over one squared, which is simply one, where rh is rudeberg's constant.
00:49
So what we have is ei, takeaway ef, that gives us hv.
00:55
So plank's constant, h, and the frequency, which is the v.
00:59
And so what we can do is sub in for frequency here.
01:07
So what we have is one takeaway 1 over x, rh, we pull that outside of the bracket.
01:19
Then what we get is the following.
01:23
That's equal to...