2016 Med Phys I Lecture 3.1c PreTest Question Title * 1. Name: Question Title * 2. Which of the following is NOT true about Rayleigh scatter? Rayleigh scatter is target dependant Rayleigh scatter is strongly peaked in the forward direction Rayleigh scatter is important for high energies applications Rayleigh scatter is important when studying x-ray diffraction Question Title * 3. For Thomson scattering at an angle of pi/2, the differential cross section per solid angle is what factor times the maximum? 1 1/2 1/3 Question Title * 4. Which of the following is not a difference between Thomson and Rayleigh scattering as models for classical scattering? Rayleigh scatter is forwardly peaked whereas Thomson scatter is symmetric. Rayleigh scatter is energy dependent and Thomson scatter is independent of energy. Thomson scatter depends on Z while Rayleigh scatter depends on Z squared. Thomson scatter is only appropriate for low energy photons whereas Rayleigh is a better fit for a larger range of photon energies Question Title * 5. In Thompson scattering, what is/are the most likely scattering directions (in degrees)? 90, -90 0, 180 0 90 Question Title * 6. Which of the following is not a parameter in the equation modeling Rayleigh Scattering? Scattering Angle Number nucleons (A) Number of protons (Z) Question Title * 7. Are there any issues that are not clear to you at this time? Done