A physics student is asked to discuss the inter-relationships among a photon’s wavelength
PHYSICS · Multi-part · A Level · Physics · Particles and radiation · Particles and radiation
Problem
A physics student is asked to discuss the inter-relationships among a photon’s wavelength, frequency, energy, and momentum in the context of Compton scattering, where an incident photon collides with a free, stationary electron and is deflected by an angle θ.
(1) Part 1: (a) Describe the relationship between a photon’s wavelength and its linear momentum, identifying the fundamental constant that connects the two quantities.
(2) Part 2: (b) Explain why the wavelength of a photon must increase when the photon loses energy during a Compton collision with a stationary electron.
(3) Part 3: (c) Qualitatively discuss how the photon’s frequency varies as the scattering angle θ increases from 0∘ to 180∘, citing the physical principles that govern the trend.