1. Quiz_14 Previous material – Compton scattering, pair production New material – Wave-Particle duality, probability, Uncertainty Principle
Physics 274
9/30/2016

2. Same frequency as the incident light
In Compton scattering, light hits an electron and bounces off at an angle from the incident direction. The electron was initially at rest, but gains momentum from the scattering. The scattered light has the
Same frequency as the incident light
Higher frequency than the incident light
Lower frequency than the incident light
Half the frequency of the incident light.
C lower frequency (higher wavelength) and lower energy, remember E=hf

3. Q.2
In Compton scattering, a photon has both energy and momentum. What are expressions for the phonon energy (E) and the magnitude of the photon momentum? D

4. Q.3
C gamma m_e c^2 (energy of each electron). Note that B is the threshold energy (minimum energy possible for each photon)

5. The principle is false, light is a wave.
Q.4
What does the “Principle of Complementarity” say about experimental results involving light
We need both the wave nature and the particle nature of light simultaneously to explain one aspect of a single experiment.
We need both wave nature and particle nature to explain all experiments but do not need both simultaneously for one aspect of a single experiment.
The principle is false, light is a wave. B