Dichroic Polarization Concept

Demonstrations in Dichroic Polarization

Overhead projector with black mask taped to the stage using blue tape, a polaroid sheet on the mask, and a ring stand with ring holding a second polaroid above the projection surface

Polaroid Sheets

Polaroid sheets on an overhead projector demonstrate Malus's Law and the three-polarizer paradox. Students observe crossed polarizers blocking light, then see that inserting a third polarizer at 45° between them …
Two wooden polarization grids clamped to a green-topped lecture bench with yellow rubber tube threaded through — one grid has horizontal bars, the other has vertical bars
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Polarized Waves

Transverse waves on a rubber tube pass through or are blocked by wooden grids, providing a mechanical analogy for light polarization. Students see single-polarizer transmission, crossed-polarizer extinction, and the surprising …
Giant metal Slinky stretched along a green demo bench with three lead bricks forming a tunnel barrier — two bricks side by side with a third across the top

Polarization: Transverse vs. Longitudinal

Uses a giant Slinky and lead brick barrier to show that transverse waves can be polarized (blocked) while longitudinal waves pass through unimpeded. Provides a mechanical analogy for how polarizing …