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Unformatted text preview: 9/07 1 Snells Law Saddleback College Physics Department Purpose To experimentally determine the index of refraction of a given medium using Snells Law and compare it to the handbook value. To experimentally determine the critical angle for a provided medium and compare it to the calculated critical angle for that medium (use the handbook value for n in this calculation). Equipment PASCO Ray Box (single white ray and colored ray)/Light Source OS-8470 PASCO Optics Table OS-8465 PASCO D-shaped Lens OS-8492 Theory Snells Law states n 1 sin 1 = n 2 sin 2 where 1 is the angle of incidence, 2 is the angle of refraction, and n 1 and n 2 are the respective indices of refraction of the materials. (See figure to the right.) c = critical angle (For all incident angles c light rays undergo total internal reflection.) Figure 1. Procedure 1. Place the ray box, on the table and slide the ray mask until only one white ray (or a single colored ray) is showing. colored ray) is showing....
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- Fall '08