Polarizing Lenses

Overhead projector with polarizing plates

Concept Overview:

1. Polarization of light

Lecturer Procedure

Step(s) to Follow	Expected Result
1. Place 1 sheet on projector. 2. Hold 2nd sheet above the first, such that the arrows are aligned. 3. Turn the 2nd polaroid 90 degrees	All light will be blocked.
1. Hold 2nd sheet steady and insert 3rd sheet in between the first and second sheet. 2. Be sure that it is not parallel to either of the two other sheets	Light will be able to get through

Step(s) to Follow

Expected Result

1. Place 1 sheet on projector.

2. Hold 2nd sheet above the first, such that the arrows are aligned.

3. Turn the 2nd polaroid 90 degrees

All light will be blocked.

1. Hold 2nd sheet steady and insert 3rd sheet in between the first and second sheet.

2. Be sure that it is not parallel to either of the two other sheets

Light will be able to get through

Physics Demonstrations