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Wear Metal Under the Microscope

Wear Metal

This is from an environmental tapelift collected in a school. Metal, being a conductive material, changes the polarization of the beam at the edge of the particle. As a result the particle has a bright halo when viewed with full crossed polars. As the polars are slightly off crossed the halo is first more difficult to see and then disappears completely.

Transmitted Off Crossed Circular Polarized Light

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