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Babinet's Slit
# 6D20.47

Description: A slit and a line are used to show the spectrum and its complement.

Instructions: Place the Babinet's slide on the overhead projector. Using either the Project Star grating or the Water Prism, the visible spectrum will be visible to the students from the slit. A line with the same width as the slit is aligned with the slit. A complemetary spectrum is produced just above the full spectrum from the slit.

Purchased/Built: built

Setup Time: 1 hour

Quant. in Demo Room: 1

Demo References
The American Journal of Physics AJP 39(1),122 A technique for constructing complementary gratings for demonstrating Babinet's principle.

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