Download Quiz 2, Wave Particle Duality - Nuclear Phenomena for Engineering Applications | MANE 2830 and more Quizzes Mechanical Engineering in PDF only on Docsity! Quiz 02: wave-particle duality Multiple choices 1. (Points: 1) For a highly relativistic electron with kinetic energy K, the quantity (pc) is: a. significantly larger than K b. approximately equal to K c. significantly smaller than K A highly relativistic electron (e.g.: K = 100 MeV, Eo = 0.5 MeV) looks like all kinetic energy and negligible rest mass energy -- like a photon. Thus, K ~ E ~ pc. Answer: b. 2. (Points: 1) For lower-mass atoms, electron de-excitation is typically in the: a. eV range b. keV range c. MeV range d. GeV range Electron de-excitation is typically in the eV range, though for massive atoms it can get into the keV range. Answer: a. 3. (Points: 1) The Compton wavelength shift is: a. A constant for a given scattering angle b. A function of the incident total energy for a given scattering angle The Compton wavelength shift is [h/(m_e c)](1 - cos(theta)), a constant for a given scattering angle. Answer: a. 4. (Points: 1) When a photon undergoes Compton scatter, its wavelength after collision is: a. Greater than its incident wavelength b. Greater than or equal to its incident wavelength c. Equal to its incident wavelength d. Less than or equal to its incident wavelength e. Less than its incident wavelength The Compton wavelength shift is [h/(m_e c)](1 - cos(theta)). The scattered photon will have a wavelength shift ranging from 0 Compton wavelengths (theta = 0 degrees) to 2 Compton wavelengths (theta = 180 degrees). Thus, its wavelength will be greater than or equal to its incident wavelength. Answer: b. : 5. (Points: 1) In the Bohr model of the atom, the force balance on the system includes which of the following forces (select all that apply): a. gravitational b. centrifugal c. centripetal d. electrostatic e. magnetic f. strong g. weak The Bohr model of the atom balances the outward centrifugal force with the inward electrostatic force. Answer: b. d. 6. (Points: 1) In the Bohr model of the atom, the kinetic energy of the system is equal to: a. zero b. the kinetic energy of the nucleus c. the kinetic energy of the electron d. the kinetic energy of the nucleus plus the electron The kinetic energy of the system in the Bohr model of the atom is just the kinetic energy of te electron; the nucleus is assumed to be at rest. Answer: c.
