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Author Topic: BBC1 Bang goes the theory  (Read 846 times)

Big Ada

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BBC1 Bang goes the theory
« on: March 29, 2011, 04:45:51 pm »

I watched the experiment where they span a black and white disc and you watched the centre tnen looked at your remote control and the numbers moved.
I would like to do this at home but I am not sure how to make the B & W spiral disc, can anyone help please.



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Re: BBC1 Bang goes the theory
« Reply #1 on: March 30, 2011, 04:03:23 pm »

Cut a disc the size you want, mount it in your portable electric drill, clamp the drill in a vice or something to hold it upright.

Now the hard bit, and some experimenting will be needed:

Turn on the drill at slow speed, get a pencil and, starting as close to the centre as you can, while the disc is rotating, draw a straight line to the outside of the disc.

When you stop the drill, you should have something approaching a spiral that you can use as a guide for the black colour.

if at first you dont succeed.....have a beer.....
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