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Good Luck! Final Exam Review Phys 222 – Supplemental Instruction Some Resources Academic Success Center (google ASC ISU) Test preparation, stress strategies Old Exams Especially those from this semester! Quizzes, Recitation Wk, Online Homework Supplemental Instruction Worksheets on pretty much every topic (google SI ISU) Internet Resources ‘The Physics Classroom’ – lenses, interference, diffraction Khan Academy 7/8/2017 Sec1 7/8/2017 7/8/2017 7/8/2017 In a homogenously charged solid sphere with radius R and charge density ρ a spherical cavity is cut out. The radius of the cavity is b, and its center is at a distance a from the center of the sphere. What is the electric field inside the cavity? 7/8/2017 7/8/2017 7/8/2017 7/8/2017 7/8/2017 Sec 2 7/8/2017 7/8/2017 Solve for the currents in each branch + + + + _ _ l l 7/8/2017 7/8/2017 7/8/2017 l 1) Which direction _ does current flow in the inductor? + The switch has been closed for a long time. Someone then comes along and opens the switch. + Just after it is opened: 2) What is the energy stored in the inductor? 7/8/2017 Sec. 3 7/8/2017 Conceptual Break Unpolarized light that goes through a series of 4 polarizers, each 30 degrees offset will have zero intensity after the fourth polarizer since the first and last polarizing axes are perpendicular. To solve for a constructive interference on a diffraction grating, the formula dsin(θ) = mλ can be used. For diffraction, m denotes the center of the mth order maxima. The wavelength of the radiated photon is larger for an electron falling n=4 to n=3 than n=2 to n=1. 7/8/2017 7/8/2017 A mirror is used to produce a virtual image that is 5.00 times bigger than the object. If the focal length of the mirror is 100 cm, where will the image be located? 7/8/2017 Consider a setup of Young’s double slit experiment where 10mm slits are separated by 15mm. If yellow light (wavelength 580nm) is shone on the slits, about how many interference maxima fall between the upper first and second diffraction bands? 7/8/2017 Two converging lenses, with the focal length f1 = 10 cm and f2 = 15 cm are placed 40 cm apart. An object is placed 60 cm in front of the first lens. a) Find the position of the final image formed by the combination of the two lenses. b) Find magnification of the final image formed by the combination of the two lenses. 7/8/2017 Natural light is incident on a thin film of crude oil (n = 1.7) floating on a water surface (n = 1.33). The thickness of the film is 80nm. What color will you primarily see? 7/8/2017 7/8/2017 A beam of x-rays with wavelength 0.6nm scatters from electrons. At what angle would the detector measure 0.605nm scattered x-rays? 7/8/2017