Physics4DExam2S10

Physics4DExam2S10 - c. Calculate the uncertainty in the...

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1 DO NOT TURN THIS PAGE!!!! NAME: __________________________________________ PHYSICS 4D SPRING 2010 EXAM 2 MAKE SURE TO SHOW ALL WORK IN COMPLETE DETAIL! NO CREDIT WILL BE GIVEN IF NO WORK IS SHOWN!
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2 1. Explain the following terms without using any mathematical definitions: a. Heisenberg Uncertainty Principle (3 pts) - b. Threshold Frequency (3 pts) – c. Bohr Correspondence Principle(3 pts) – d. Matter Waves (3 pts) – e. Dispersive Medium (3 pts) -
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3 2. Find the energy of an x-ray photon that can impart a maximum energy of 50 keV to an electron by Compton collision. (10 pts).
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4 3. An electron in the hydrogen atom is in the n =2 state for 10 -6 s before falling to the n = 1 state. (10 pts) a. Calculate the wavelength of emitted photon. b. Estimate the recoil momentum and kinetic energy of the atom.
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Unformatted text preview: c. Calculate the uncertainty in the energy of the emitted photon. 5 5. When a pebble is tossed into a pond, a circular wave pulse propagates outward from the disturbance. If you are alert you will see a fine structure in the pulse consisting of surface ripples moving inward through the circular disturbance. Explain this effect in terms of group and phase velocity if the phase velocity of the ripples if given by S v p 2 , where S is the surface tension and is the density of the liquid. (10 pts) 6 6. Suppose a beginning physics student asks you if its possible for a particle to be at two different places at the same instant in time. Use the Double-Slit Experiment to answer the students question. ( 5 pts)...
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This note was uploaded on 09/02/2011 for the course PHYS 4D taught by Professor Luna during the Spring '11 term at DeAnza College.

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Physics4DExam2S10 - c. Calculate the uncertainty in the...

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