MadSci Network: Other
Query:

Re: You are in a room with three light switches connected to a light bulb in ..

Date: Sun Jul 2 18:19:46 2000
Posted By: Kermit Rose, Staff, Academic Computing Network Services, Florida State University
Area of science: Other
ID: 961910339.Ot
Message:

Yes.  This uses the trick that if a light bulb is turned on for a while,
it  becomes very hot.

So, turn on switch 1 and leave it on for about 5 minutes.  Then Turn off
switch 1, turn on switch 2, and immediately go into the room.

The lit bulb belongs to switch 2.
The hot unlit bulb belongs to switch 1.
The cold unlit bulb belongs to switch 3.



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