Description
8mm rod attachment and a centered 50mm aperture together hold a lens square against an optical-bench rail for repeatable refraction
and 125mm in a plastic wallet with keepers
producing distinct audible pitches at varying spin speeds to relate rotational frequency to perceived sound frequency
Demonstrates Hooke's Law
Variable Gap Magnet for Physics Demonstrations Base Size_8 x 5" 8mm rod attachment and aAdjustment screws (3 x 1 inch) on a metal base position two neodymium magnets, varying the pole gap from 0. 4 to 8. 5cm and field strength from 100 to 7500 Gauss across the working volume.
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