ASSIG11 - Section: _ Name: _ Assignment 11: Quantum Physics...

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Section: ______ Name: ______________________________ Section Instructor: ______________________________ Physics 2208, Spring 2009 1 Cornell University Assignment 11: Quantum Physics I Concepts: photoelectric effect particle aspects of light photons ( Eh f h c == λ ) photon momentum ( p hf c h ) continuous x-ray spectrum line spectra of atoms emission vs. absorption spectra continuous emission spectra Reading in text: Chapter 38: Sections 1-3, 4 (We won’t analyze the Compton effect in detail. Do note that a photon has momentum.), 5. Chapter 39: Section 8 (Focus on subsection “Orbital Energy Is Quantized,” page 1099.), 9 (Introductory paragraph and subsection “Energy Levels and Spectra of the Hydrogen Atom,” pages 1100-1101.). Chapter 40: Section 10 (First part only: “The Continuous X-Ray Spectrum,” pages 1127-1128.). Some possibly useful values: Description Symbol & Value speed of light c = × = × 300 10 81 .. m/s nm/s 7 Planck constant h = × × 6 63 10 414 10 34 15 .J s = . e V s hc hc = × 1240 10 3 .e V n m elementary charge e = × 160 10 19 .C Assignment: Quiz may be given on Tuesday April 21 or Wednesday April 22. Due in lecture on Monday April 20. 1. Light is directed onto a metallic target (T) inside an evacuated glass phototube that is connected to a voltmeter as shown. As electrons are photoemitted from the target T and reach the metal collector (C), T and C charge up like a capacitor.
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This note was uploaded on 09/01/2009 for the course PHYS 208 taught by Professor Amadeuri during the Spring '08 term at Cornell University (Engineering School).

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ASSIG11 - Section: _ Name: _ Assignment 11: Quantum Physics...

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