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[Physltest] [Phys-L] Re: 'Seeing' frequencies above 30-40Hz (fwd)

A fluorescent wall (or screen) would be needed to show a wiggly line.
Right?
Red light (from a He-Ne laser) will not produce visible fluorescent
light in
common substances, such as ZnS.
Ludwik Kowalski

On Friday, Jan 14, 2005, at 20:00 America/New_York, Bernard Cleyet
wrote:

Using a 78 rpm turn table, the beam will circle the room in ~ one sec;
w/ a c (256 or is it a C) fork, depending on the size of the room the
sine will be nicely resolved. I don't see the problem.

bc

Ludwik Kowalski wrote:

I would place a laser on the same rotating platform as the tuning fork
with a mirror in the vertical plane (on one of the prongs). In that .
. .
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