Snell's law - Introduction

Snell’s Law

Experiment #10

Introduction:

Experimental Setup:

· Lens, Cylindrical D-Lens pasco OS-8492

· Laser

· Ray table with stand

· Viewing screen with 2 binder clips

· Table jack

· Optics Track

Diagram: Procedure part 1 Procedure part 2

Experimental Procedure:

· Place the ray table and viewing screen on top of the optics track.

· Place the laser on top of the table jack. Lift and aligned so that the laser beam will go straight through the middle of the set up.

· Place the cylindrical D-lens on top and in the center of the ray table so that the laser beam will go straight through the middle of the lens.

· Collect 5 data points from the laser beam hitting the straight edge of the cylindrical lens as it is rotated and 5 data points from the laser beam hitting the rounded side of the cylindrical lens as it is rotated.

· Record in data table.

Data:

Procedure part 1:

	Sin		Sin
15	0.259	15	0.259
25	0.425	21	0.358
30	0.5	23	0.391
36	0.588	27	0.454
42	0.669	31	0.515

Procedure part 2:

	Sin		Sin
8	0.139	12	0.208
12	0.208	17	0.292
18	0.309	27	0.454
25	0.423	39	0.629
30	0.5	50	0.766

Procedure Part 3:

Calculations and Results:

Part 1:

Part 2:

Part 3:

=

Critical angle= 90-58.9=> 31.1

Conclusion: