A photon is back-scattered ( ) from a free electron and emerges with a wavelength of

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

A photon is back-scattered (

\theta =180^{\circ}

) from a free electron and emerges with a wavelength of

0.062\,\text{nm}

. What was the photon’s incident wavelength? (Electron Compton wavelength

=2.43\times10^{-12}\,\text{m}

.) (a)

0.060\,\text{nm}

(b)

0.055\,\text{nm}

(c)

0.057\,\text{nm}

(d)

0.067\,\text{nm}