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Who's up for a challenge? Quantum Que

  • Thread starter minimax
  • Start date
minimax
1. Homework Statement
An incident x-ray has a wavelength of 0.525nm and scatters as 112 degrees above the incidental x-axis in the positive x-direction. Find the direction of propagation of the electron that the incidental wavelength hits. (the answer is to be 34 degrees below the x-axis)


2. Homework Equations
Using Compton's Effect
[tex]\frac{h}{\lambda_{1}}[/tex]=[tex]\frac{h}{\lambda_{2}}[/tex] cos[tex]\theta[/tex]+pecos[tex]\phi[/tex]

0=[tex]\frac{h}{\lambda_{2}}[/tex] sin[tex]\theta[/tex]+pesin[tex]\phi[/tex]

where [tex]\phi[/tex] = angle of electron direction
[tex]\theta[/tex]= angle of x-ray direction
pe=momentum of electron


3. The Attempt at a Solution
Since the electron momentum is not given, numbers can't be plugged in to find the angle.
Possibly the two equations have to be manipulated together (ie add/subtract) somehow?
Or using energy equations?
 

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