A beam of photons of wavelength 0.55 nm undergoes Compton scattering from free electrons.
-What is the momentum of the photons that emerge at a 55° angle with respect to the incident beam?
A)1.20E-24 kg·m/s
B)1.20E-33 kg·m/s
C)3.65E-34 kg·m/s
D)8.31E+23 kg·m/s

Question

A beam of photons of wavelength 0.55 nm undergoes Compton scattering from free electrons.
-​What is the momentum of the photons that emerge at a 55° angle with respect to the incident beam?
A)​1.20E-24 kg·m/s
B)​1.20E-33 kg·m/s
C)​3.65E-34 kg·m/s
D)​8.31E+23 kg·m/s

Quizplus · Accepted Answer

The correct answer is A.The momentum of the photons that emerge at a 55° angle with respect to the incident beam is given by:$$p = \frac{h}{\lambda} \sin(	heta)$$where:* h is the Planck constant* λ is the wavelength of the incident beam* θ is the scattering angleSubstituting the given values into the equation, we get:$$p = \frac{6.63 	imes 10^{-34} 	ext{ J s}}{5.5 	imes 10^{-11} 	ext{ m}} \sin(55^\circ) = 1.20 	imes 10^{-24} 	ext{ kg m/s}$$

A Beam of Photons of Wavelength 0