Clue to Riddle #7: Three Light Bulbs & Switches in a Room
7. A windowless room contains three identical light fixtures, each containing an identical light bulb or light globe. Each light is connected to one of three switches outside of the room. Each bulb is switched off at present. You are outside the room, and the door is closed. Before opening the door you may play around with the light switches as many times as you like. But once you've opened the door, you may no longer touch a switch. After this, you go into the room and examine the lights. How can you tell which switch goes to which light?
Light Bulbs or Light Globes get hot when they're on.
Have a play with the simulator below. Once you know what you're at don't forget to hide the bulbs whilst you're flicking the switches.
Note: no information is sent to me, the simulation is done entirely locally, on your computer.
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