Mirrors and lens - lab report PDF

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Experiment: Spherical Mirrors and Lenses Name: Abdonnie “Abbey” Holder Physics 156 Section: 15768 Partner: Hyun Kuk Yoon & May Myet Chel Professor: George Poppe Experiment Date: 11/15/2018 Due Date: 11/29/2018

Objective The objective is for experimenters to understand the transition of light reflected from spherical mirrors and light passing through spherical lenses. Measure the the focal point and center of curvature of a concave mirror. Measure the the focal point and center of curvature of a convex mirror. Measure the focal lengths of a converging lens. Lastly, experimenters are find and measure the focal lengths of a diverging lens. Principal When parallel rays of light falls on a spherical concave mirror then the reflection that passes through one and the same point this point is known as the focal point. The distance between the focal point and the mirror vertex is the focal length which is denoted with f. Spherical mirrors has focal lengths that are equals to half of the radius of curvature of the mirror. This is found using the following formula: f = R/2. Apparatus Laser ray box 3-sided mirror (plane, concave and convex) Diverging and converging lenses Ruler 11x17 paper, masking tape LED

lamp

Results Overall there was little percent error in the overall calculations. The percent difference for part onee was zero as the distance from V to F was 5.8cm whereas the distance from C to V was 11.6cm approximately double V to F. When this is taken into account and applied to the formula f = R/2 then experimenters are able to find out that there is zero percent error. The results for the rest of the calculations was as the following: 6.45% part two, 0% part three, and lastly 0% for part four. Discussion Experimenters were successful in understanding the transition of light reflected from spherical mirrors and light passing through spherical lenses. In addition experimenters were successful in measuring the the focal point and center of curvature of a concave mirror. Conclusion Overall, experimenters computed a successful experiment that resulted in very little percent error that was significant enough to cause create distortion in the experiment, however, the experimental error that was developed may have came about from systematic errors and personal errors. Theses error can be fine tuned by double checking that experimenters are conducting the experiment correctly in an orderly fashion.

Experimental Questions: 1. Explain, why the center of curvature of a spherical mirror can be found using the rays reflected upon itself (see Procedure Parts I and II)?

1. If the object is at the center of curvature, the reflected light also passes through the center of curvature. So the center of curvature of a spherical mirror can be found using the rays reflected upon itself. b. Which mirrors can be used for projecting images on a screen? 1. The mirror with a plane surface of reflectance. b. Which lenses can be used for projecting images on a screen? 1. Biconcave lenses b. Which mirrors and lenses can produce real images? Under which conditions? 1. Plane mirrors, convex mirrors, and diverging lenses can never produce a real image. A concave mirror and a converging lens will only produce a real image if the object is located beyond the focal point. b. Which mirrors and lenses can produce virtual images? Under which conditions? 1. Convex mirrors can also produce virtual images. When the object is placed at a distance greater than one focal length....