Og-1 Polarisation
Aim
To demonstrate various aspects of polarised light.
Apparatus
- Overhead projector
- Mica sheet
- Strained glass
- Perspex models
- Cellophane
Polarisation Setup
Description
An overhead projector has been converted into a home made polariscope by the addition of a large sheet of polaroid permanently fixed below the Fresnel lens. A second polaroid is attached to a motor allowing slow rotation. The demonstrations that may be displayed with this setup are:
- Crossed polaroids
- Interference colours in mica
- Strain birefringence