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### Fall 07 Phys 143l HW 4

Course: PHYSICS 143L, Fall 2007
School: Duke
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University Duke Department of Physics Physics 143 Fall Term 2007 HOMEWORK 4 Available: September 17 Due: September 24 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem 1: BFG Ch. 4 Problem 2 Problem 2: BFG Ch. 4 Problems 7, 9 Problem 3: BFG Ch. 4 Problem This 16 isn't really a &quot;3-box problem&quot;. Note that the...

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University Duke Department of Physics Physics 143 Fall Term 2007 HOMEWORK 4 Available: September 17 Due: September 24 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem 1: BFG Ch. 4 Problem 2 Problem 2: BFG Ch. 4 Problems 7, 9 Problem 3: BFG Ch. 4 Problem This 16 isn't really a "3-box problem". Note that the answer in the subsequent problem, number 17, should have h substituted for h inside the exponential. Problem 4: BFG Ch. 4 Problem 23 Note: estimate only needed here. Assume 400-800 nm visual wavelengths. Problem 5: BFG Ch. 4 Problem 30 Problem 6: BFG Ch. 4 Problem 34
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Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007PRACTICE QUIZ 1I will abide by the Duke Community Standard. Name:This is a closed book exam, with one side of one page cheat sheet allowed. Calculators are allowed, but only for bas
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 11Available: November 20 Due: November 30 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Prob
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 6Available: October 15 Due: October 29 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 5Due: October 15 Problem 1: (BFG Ch.5 Problem 4)Suppose that a hydrogen atom in the ground state absorbs a photon of wavelength 15nm. Will the atom be ionized? If so, what will be the kinetic energy of the elect
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 6Due: October 29 Problem 1: (BFG Ch.7 Problem 1, 3)1. Consider the very simple wave packet x A exp i p p x A exp i p p xShow that x takes the form of a single plane wave of momentum p multiplied by a functio
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007PRACTICE FINAL EXAMI will abide by the Duke Honor Code. Name:This is a closed book exam, with two sides of one page cheat sheet allowed. Calculators are allowed, but only for basic
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007PRACTICE QUIZ 1 SOLUTIONSProblem 1: Red light from a laser ( = 632.8 nm) is incident on a screen containing two very narrow horizontal slits separated by 0.200 mm. A fringe pattern ap
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 5Available: October 1 Due: October 15 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Duke - COMPSCI - 100
Test 2: Compsci 100Owen Astrachan April 2, 2008Name: Login: Honor code acknowledgment (signature)(2 points)Problem 1 Problem 2 Problem 3 Problem 4 TOTAL:value 32 pts. 6 pts. 22 pts. 20 pts. 80 pts.gradeThis test has 12 pages, be sure you
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007PRACTICE FINAL EXAMI will abide by the Duke Community Standard. Name:This is a closed book exam, with two sides of one page cheat sheet allowed. Calculators are allowed, but only fo
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007PRACTICE QUIZ 2I will abide by the Duke Community Standard. Name:This is a closed book exam, with one side of one page cheat sheet allowed. Calculators are allowed, but only for bas
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 7Available: October 22 Due: October 29 at the beginning of class. Imagine you are a science journalist writing for a magazine with a scientifically informed general public re
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Physics 143 Fall Term 2007HOMEWORK 1Due: September 3 Problem 1: Introduce YourselfBy next Monday, please send me an email (schol@phy.duke.edu) introducing yourself, indicating: Your major or planned major (if you know it). Your long term profes
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 1Available: August 27 Due: September 3 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 2Due: September 10A very fine wire 7.35 10-3 mm in diameter is placed between two flat glass plates, at one edge of the plates parallel to the sides of the plates. The edges of the plates touch on each other on
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 2Available: September 3 Due: September 10 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Prob
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 3Due: September 17 Problem 1: (BFG Ch.2 Problem 18)A relativistic pole-vaulter holds a pole that is 16ft long in his rest frame. He runs with the pole aligned in the direction of his 1/2. He approaches a shed th
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 3Available: September 10 Due: September 17 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Pro
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 8Due: November 5 Problem 1:Estimate the time that a virtual turnip-antiturnip pair could exist. If you somehow had a real turnip-antiturnip pair, about how much energy would be released when they annihilated?A
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 10Available: November 12 Due: November 20 by 4 pm. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem 1: BFG Ch. 9 P
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Test 1: Compsci 100Owen Astrachan February 13, 2008Name: Login: Honor code acknowledgment (signature)(3 points)Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 TOTAL:value 12 pts. 20 pts. 22 pts. 28 pts. 15 pts. 97 pts.gradeThis test ha
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Physics 143 Fall Term 2007HOMEWORK 4Due: September 24Problem 1: (BFG Ch.4 Problem 2)Chemical processes typically involve energies on the order of 1eV. What, then, is the typical wavelength of electromagnetic radiation emitted in the course of c
Duke - COMPSCI - 100
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Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 12Available: November 26 Due: December 7 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Probl
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 12Due: December 7 Problem 1: (BFG Ch.10 Problem 13)Calculate the Fermi energy for Cu and Lead.The Fermi energy is: EF where n is the density of free electrons: 2m 3 n/ M n Am N n n V V Am where n i
Duke - PHYSICS - 143L
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Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 9Available: November 5 Due: November 12 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Proble
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 10Due: November 20 Problem 1: (BFG Ch.9 Problem 21)m=-2 The quantum state splits by m, there are 2l 1 energy levels: m=-1 right figure There are 5 3 15 possible transitions. When we m=0 m=1 take into account
Duke - PHYSICS - 143L
Duke University Department of Physics Physics 143 Fall Term 2007HOMEWORK 8Available: October 29 Due: November 5 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Duke - PHYSICS - 143L
Physics 143 Fall Term 2007HOMEWORK 9Due: November 12 Problem 1: (BFG Ch.9 Problem 9)Use Eq.(9-37) to evaluate the frequency of the light emitted in a transition between two states: Assume Z=1(Hydrogen)Eq. 937 E Transition from n=2, l=1 to n=1
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