Light Reflection and Refraction Pre-Lab using PhET I) Introduction: When a light ray strikes a smooth interface separating two transparent materials (like air‚ glass‚ or water)‚ the wave is partly reflected and partly refracted (or transmitted) into the second material. For an example of this‚ imagine you are outside looking at a restaurant window. You can probably see both the inside of the restaurant (from the refracted light) and some of the street behind you (from the reflected light). Similarly
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Refraction in Biconcave Lens Now let’s investigate the refraction of light by double concave lens. Suppose that several rays of light approach the lens; and suppose that these rays of light are travelling parallel to the principal axis. Upon reaching the front face of the lens‚ each ray of light will refract towards the normal to the surface. At this boundary‚ the light ray is passing from air into a more dense medium (usually plastic or glass). Since the light ray is passing from a medium in
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data and observed the refractions ten more times. Data Table Data Table: Snell ’s Law and Refraction | Trial number | Sin θ₁ | Sin θ₂ | m₂ | 1 | 0⁰ | 0⁰ | 0.0 | 2 | 10⁰ | 4⁰ | 2.0 | 3 | 20⁰ | 8⁰ | 2.5 | 4 | 30⁰ | 12⁰ | 2.4 | 5 | 40⁰ | 15⁰ | 2.5 | 6 | 50⁰ | 20⁰ | 2.2 | 7 | 60⁰ | 25⁰ | 2.0 | 8 | 70⁰ | 32⁰ | 1.8 | 9 | 80⁰ | 40⁰ | 1.5 | 10 | 90⁰ | 0⁰ | 0.0 | Error analysis One window for error we noticed occurred when reading the angle of refraction. It was hard to decide
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References: "Table of Refraction." Microsoft® Encarta® 2009 [DVD]. Redmond‚ WA: Microsoft Corporation‚ 2009 "Refraction." Microsoft® Encarta® 2009 [DVD] "Snell’s Law." Microsoft® Encarta® 2009 [DVD]. Redmond‚ WA: Microsoft Corporation‚ 2009 Journals Cuadra‚ Cristy Marie O.‚ et al. “Phytochemical Testing of Barbados Cherry
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Light‚ Refraction and Lenses Name: Light Refraction Read from Lesson 1 of the Refraction and Lenses chapter at The Physics Classroom: http://www.physicsclassroom.com/Class/refrn/u14l1a.html http://www.physicsclassroom.com/Class/refrn/u14l1b.html http://www.physicsclassroom.com/Class/refrn/u14l1c.html http://www.physicsclassroom.com/Class/refrn/u14l1f.html MOP Connection: 1. 2. Refraction and Lenses: sublevels 1 and 2 Write a one-word synonym for refraction. Refraction occurs when light crosses
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Objective The objective of this experiment is to understand reflection and refraction and how they vary with different matters. At the end of this experiment‚ you will be able to: Determine index of refraction of various solutions Recognize the passage of refracted beams though different medium Understand the concept of Snell’s Law Understand how the speed of electromagnetic waves in different matters are related Determine the critical angle for total internal reflection Materials 550
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In optics the refractive index (or index of refraction) n of a substance (optical medium) is a dimensionless number that describes how light‚ or any other radiation‚ propagates through that medium. Its most elementary occurrence (and historically the first one) is in Snell’s law of refraction‚ n1sinθ1= n2sinθ2‚ where θ1 and θ2 are the angles of incidence of a ray crossing the interface between two media with refractive indices n1 and n2. Refraction‚ critical angle and reflection of light at the
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Namee: Paul G. Zamora (Homework in Performance Techniques) Sound Waves- A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium (such as air‚ water‚ or any other liquid or solid matter) as it propagates away from the source of the sound. The source is some object that causes a vibration‚ such as a ringing telephone‚ or a person’s vocal chords. The vibration disturbs the particles in the surrounding medium; those particles disturb those next to them
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Pencil THEORY: Refraction: In a homogenous medium‚ light travels along a straight line‚ but whenever it falls on a surface of another medium‚ a very small fraction of it is reflected back and most of the light passes into the medium‚ though with a change of direction. This phenomenon of the bending of light at the surface of separation of the two medium is called refraction of light. Causes of refraction: This phenomenon of refraction takes place when a beam of light
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Concave Lens Compass Plane Mirror Convex Lens Protractor Concave Mirror Prism Ruler Convex Mirror Water Tray III. Theory Ray diagrams Focal length Radius of curvature Law of reflection Snell’s Law (Refraction) Total Internal Reflection IV. Experimental Procedure A. Plane Mirrors 1. Use a ruler to draw a straight line on one side of a sheet of paper near the center‚ then draw a perpendicular line through the center of the first line. 2. Line
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