Pre-lab 6
Lab Meeting Time :						Name :


	1. What is Snell's law ? (Explain meaning of symbols used.)        (3)













	2. In the first part of the expt., you've to use a plexiglass slab
	   to trace a ray digram. Draw the ray digram you expect to see.    (4)
























	3. What is meant by 'Total internal reflection' ?                  (3)