# Homework Help: Wavelength of scattered photon and angle of scattering in the Compton scattering

1. Dec 3, 2012

### Ezequiel

1. The problem statement, all variables and given/known data

In the Compton scattering, a photon of wavelength λ collides with an electron at rest, and a new photon of wavelength λ' emerges at an angle θ. Find λ' y θ.

Energy of incident photon Ei = 1 MeV
Energy of scattered electron Ee = 0.32 MeV

2. Relevant equations

E = $\frac{hc}{λ}$

λ' - λ = λc(1 - cosθ)

c being Compton wavelength)

3. The attempt at a solution

λ' = $\frac{hc}{E_i - E_e}$ = $\frac{1240 eV · nm}{0.68 MeV}$ = 1.82 pm

θ = cos-1$\left(\frac{λ - λ'}{λ_c} + 1\right)$ = 40.45°

Am I right?