AP Free Response Question
2002 B7
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A photon of wavelength 2.0 x 10
^{-11}
m strikes a free electron of mass m
_{e}
that is initially at rest, as shown above left. After the collision, the photon is shifted in wavelength by an amount
, and reversed in direction, as shown above right.
(a) Determine the energy in joules of the incident photon.
(b) Determine the magnitude of the momentum of the incident photon.
(c) Indicate below whether the photon wavelength is increased or decreased by the interaction. Explain your reasoning.
(d) Determine the magnitude of the momentum acquired by the electron.
Topic Formulas
Description
Published Formula
impulse
linear momentum
mass-energy equivalence
photoelectric equation
photon energy
photon momentum
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