OPTICS - GEOMETRICAL OPTICS - THICK LENS NC State University Faculty Access

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Fresnel Lens on Overhead
# 6A65.701


Description: An old overhead projector is supplied without the arm. Turn on the projector and shake chalk dust over the Fresnel lens. The dust will show a cone of light coming into focus. This is a great demo!

Parts: Old overhead without arm, erasers full of chalk dust

Setup Time: 5 min

Quant. in Demo Room: 1


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