28 Marks Total ASSIGNMENT 14 Compton, de Broglie, and Wave-Particle Duality (1) There are similarities and differences between the Photoelectric Effect and Compton Scattering. Complete each of the six partial statements below using the following guide; all you need to provide for an answer is PE, CS, BOTH, or NEITHER. • PE if the statement only applies to the Photoelectric Effect • CS if the statement only applies to Compton Scattering • BOTH if the statement only applies to both the Photoelectric Effect and Compton Scattering • NEITHER if the statement applies to Neither the Photoelectric Effect or Compton Scattering a. Energy is conserved in _____. Answer: (1) b. Photons are observed before and after the interaction in _____. Answer: (1) c. Electrons are observed as the result of the experiment in _____. Answer: (1) d. Angles are measured in the experiment in _____. Answer: (1) e. Photons with very low energies such as 5.0 to 10.0 eV is observed in _____. Answer: (1) f. Ionization occurs in _____. Answer: (2) 2. What quantity measured in the Compton effect experiment show the wave-particle duality of light? Answer: (5) 3. An X-ray with a frequency of 3.74 × 1020 Hz is incident on a thin piece of metal. The lower frequency X-ray on the other side is observed deflected at 48o. What is the frequency of the deflected X-ray? Answer: (5) 4. A scientist changes the frequency of an incident X-ray to 4.50 × 1019 Hz and measures the deflected X-ray frequency of 4.32 × 1019 Hz. What was the angle of deflection? Answer: (2) 5. Can the equation E = pc be applied to particles? Why or why not? Answer: (3) 6. A stationary hydrogen atom with a mass of 1.67 × 10-27 kg absorbs a photon of light with 10.2 eV. What is the velocity of the hydrogen atom after absorbing the photon in a perfectly inelastic collision? Answer: (2) 7. Describe the results of performing Young’s experiment with x-rays and then high speed electrons. Answer: (2) 8. How do the results of performing Young’s experiment with x-rays and then high speed electrons support the wave-particle model? Answer: (1) 9. All of the following quantities can be measured or calculated for light waves and subatomic particles except _____. A. momentum B. velocity C. frequency D. energy Answer:

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