00:01
For this exercise, we have a certain incident photon that scatters off at an angle of 100 degrees.
00:08
And we know that the scattered wavelength of the photon is going to be, according to the exercise, 124 .65 picometers, which is the same as 1 .2465 picometers, meters and we're asked, given these information, what is the incident wavelength of the photon? so in order to calculate this, we need to write now compton's formula.
00:51
So according to compton's formula, the wavelength of the scattered photon is going to be the wavelength of the incident photon plus h over m .e.
01:06
C.
01:07
H is the plinx constant.
01:09
M .e.
01:10
Is the mass of the electron.
01:11
C is the speed of light times 1 minus cosine of the scattering angle.
01:19
So we have some information here...