Data Sheet online(M1. Reflection_Refraction)(2) copy

This data sheet is due May 11 PHY 156 __________________________________________________________________ Data Sheet (M1. Reflection/Refraction ) - Your Name: Harrison Dhouib Reading assignment - https://openstax.org/books/college-physics/pages/25-introduction-to-geometric-optics - https://openstax.org/books/college-physics/pages/25-1-the-ray-aspect-of-light - https://openstax.org/books/college-physics/pages/25-2-the-law-of-reflection - https://openstax.org/books/college-physics/pages/25-3-the-law-of-refraction - https://openstax.org/books/college-physics/pages/25-4-total-internal-reflection - PHY 156 manual ‘LABWORK 12’ ( Reflection and refraction ) Video clips for Reflection and refraction - https://www.youtube.com/watch?v=NtjTzuEPpb4 (Simple experiment for reflection and refraction) - https://www.youtube.com/watch?v=Lic3gCS_bKo (Intro and experiment for total internal reflection 1) - https://www.youtube.com/watch?v=ybvjcjndn_4 (Intro and experiment for total internal reflection 2) Simulator for Reflection and refraction To find the simulators access the links ( Simulator 1 ) https://www.physicsclassroom.com/Physics-Interactives/Reflection-and-Mirrors/Plane-Mirror- Images/Plane-Mirror-Interactive ( Simulator 2 ) https://phet.colorado.edu/sims/html/bending-light/latest/bending-light_en.html ( Simulator 3 ) https://www.reading.ac.uk/virtualexperiments/ves/tir.html The main formula: - The law of reflection for a laser beam incident upon a flat mirror is θ i = θ ℜ Eq.1 where θ i is the angle of incidence and θ ℜ the angle of reflection. - If a laser beam travels from a transparent medium with refractive index n 1 to another transparent medium with index n 2 and it is refracted on the interface, Snell’s law reads n 1 sin θ 1 = n 2 sin θ 2 Eq.2 where θ 1 is the angle of incidence and θ 2 the angle of refraction. Page 1

This data sheet is due May 11 PHY 156 __________________________________________________________________ Objective: - You examine the laws of reflection and refraction. Using Simulator 1 , you get familiar with the law of reflection You test Snell’s law and total internal reflection using Simulators 2 and 3 . Task: - (1) Fill out the tables (on pages 3 through 5) with your data that you got from the simulation and (2) answer the post-virtual-lab questions on page 5. When you fill out the table, check sample calculations. Procedure: Access the web link for the simulators and read the instruction if they have. Part 1 Getting familiar with the law of reflection . (Play with the simulator.) 1. Run the online simulator 1 following the instruction on the simulator to understand the law of reflection. For this part, you do neither calculation nor data acquisition. Part 2 Finding the refractive index 1. Access the web link for Simulator 2 and choose ‘Prisms’. 2. ( Laser beam ) On the simulator screen, you can find a laser pointer. Click on the red button to eject a laser beam. You can move the pointer by dragging the silver body of the pointer. Also, you can turn the laser beam in any direction by dragging the gold tail. 3. ( Optical elements and Environment ) To change the indexes of refraction, you can choose materials of ‘objects’ and ‘environment’ from air, glass, water, mystery A and mystery B. 4. ( Set up ) Aim the laser beam horizontally on the screen like the below example. Click on the tiny box for ‘ Protractor ’ and rotate the protractor by dragging it. Keep adjusting the location of laser beam and rotating protractor until the laser beam passes through both the 0 degrees marks on the protractor. Drag the semicircular prism and place it so that its flat surface faces the laser pointer and is lined up with the long vertical edge of the protractor. (You can rotate the prism by dragging the gold part of the prism.) Make sure the transmitted laser beam still passes through 0 degrees mark. Page 2

This data sheet is due May 11 PHY 156 __________________________________________________________________ Page 4

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This data sheet is due May 11 PHY 156 __________________________________________________________________ Page 7