Re: moving wall laser demo

[Herbert H Gottlieb <herbgottlieb@JUNO.COM>]

Thanks for the help.   Why don't you send your idea to The Physics
Teacher for publication?

I do not recall seeing it before.

Herb Gottlieb

On Sat, 01 Jul 2000 11:51:26 -0400 Physics <Physics@ROCHESTER.RR.COM>
writes:
> > I would like to try the wall-moving demo described below.
> > 1. Is the aluminum rod held in a horizontal or a vertical position
> next
> > to the wall?
> > ....or does the free end of the rod extend into the room?
>
> It is horizontal perpendicular to the wall.
>
> > 2. is the flat piece of metal (or cube) attached to the wall or to
> the
> > top of a horizontal table?
>
> On top of a level table (preferably massive)
>
>
> > 3. Will it make any difference if the aluminum rod is much longer
> or much
> > shorter than 30 cm??
>
> I use a meter long lab table aluminum demo rod.  Any could be used.
>
>
> Gene Gordon