Copy of Physics 2 Lab 9

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Old Dominion University *

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112

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Physics

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Feb 20, 2024

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OLD DOMINION UNIVERSITY PHYS 112 PHYS 227/232/262 PH09 – Reflection and Refraction Submitted By:\ Submitted on Date Lab Instructor
Introduction: This experiment explores the fundamental laws of reflection and refraction of light with image formation in mirrors and lenses. The Law of Reflection states that the angle of incidence is equal to the angle of reflection, with both angles measured in respect to the normal. Similarly, Snell's Law describes the relationship between the angles of incidence and refraction and the indices of refraction for the point of interest. We use the equation below to describe this : n 1 sin(theta) 1 =n 2 sin(theta) 2 For image formation in spherical mirrors, the thin lens equation: (1/d 0 + 1/d i =1/f) uses the focal length of the lens and the distances from the object and image. In part A, we observed the Law of Reflection by observing the reflection of a single ray of light from the plane mirror and measuring angles the light reflects. We saw the Law of Refraction in action in a similar way by looking through a cylindrical lens and measuring angles of refraction from the light. In part C, we examined properties like focal length, image location, magnification, and inversion with the concave side of the mirror. Magnification can be described using the equation: m = -d i /d 0 In part D, we used the same setup to understand the relationships between object and image distances, as well as their heights but with the convex lens. Lastly, we used Data Table 2 to create a graph with a line of best fit to determine slope. The slope on the graph helped us find the index of refraction for acrylic by using our average.
Data: Data Table 1 The Law of Reflection Angle of: Incidence (Right of Normal) Angle of: Reflection # 1 Angle of: Incidence (Left of Normal) Angle of: Reflection #2 0° 0 0° 0 10° 10 10° 10 20° 20 20° 20 30° 30 30° 30 40° 40 40° 40 50° 50 50° 50 60° 60 60° 60 70° 70 70° 70 80° 80 80° 80 90° 90 (doesn’t really touch the mirror) 90° 90
Data Table 2 The Law of Refraction Angle of: Incidenc e (Right of Normal) sinθ incidence Angle of: Refractio n sinθ refracted Angle of: Incidenc e (Left of Normal) sinθ incidence Angle of: Refractio n #2 sinθ refracted 0° 0 0° 0 0° 0 0° 0 10° 0.173648178 6° 0.10452846 10° 0.173648178 6° 0.1045 20° 0.342020143 13° 0.22495105 20° 0.342020143 12° 0.2079 30° 0.5 19.5° 0.33380686 30° 0.5 18.5° 0.3173 40° 0.64278761 25° 0.42261826 40° 0.64278761 25.5° 0.4305 50° 0.766044443 30.5° 0.50753836 50° 0.766044443 30° 0.5 60° 0.866025404 35.5° 0.58070296 60° 0.866025404 34° 0.5592 70° 0.939692621 39° 0.62932039 70° 0.939692621 38° 0.6157 80° 0.984807753 41° 0.65605903 80° 0.984807753 41° 0.6561
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