- #1
DeathByKugelBlitz
Gold Member
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Homework Statement
A photon with an initial wavelength of 0.1120 nm collides with a free electron that is initially at rest. After the collision the wavelength is 0.1140 nm .
a) What is the kinetic energy of the electron after the collision?
b) What is its speed?
c) If the electron is suddenly stopped (for example, in a solid target), all of its kinetic energy is used to create a photon. What is the wavelength of this photon?
Homework Equations
E = hf = pc
p = E/c = hf/c = h/λ
λ' - λ = h/mc(1 - cos∅)
The Attempt at a Solution
E = hc/λ - hc/λ' = hc(1/λ - λ')
= 9.945 x 106 which is marked as incorrect
This would make my answers to parts b) and c) incorrect too