POF #3

Problem of the Fortnight #3


On the first floor of a building there are three switches with the on/off positions correctly indicated. There are three ordinary light bulbs in the basement. Each switch is connected to only a single bulb, but you don’t know which switch is connected to which light bulb.

How can you figure out which switch operates which light bulb? You are allowed only one trip down to the basement.

Due date: Monday, March 17, at 4:00 PM


Return to the Physics Problem of the Fortnight page.