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Unformatted text preview: 9/07 1 Snell’s Law Saddleback College Physics Department Purpose • To experimentally determine the index of refraction of a given medium using Snell’s 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 Snell’s Law states n 1 sin θ 1 = n 2 sin θ 2 where θ 1 is the angle of incidence, θ 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 θ = critical angle (For all incident angles ≥ c θ 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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This note was uploaded on 10/05/2011 for the course PHYS 4c taught by Professor Parsons,b during the Fall '08 term at Saddleback.
- Fall '08