# Riddle Me Physics

Physics is all about riddles. What are we made of? How did we get here? How do you cool down a group of particles to a millionth of a degree above absolute zero when you can only build a refrigerator that gets down to 4 Kelvin? Physicists must find the answers.

If you like riddles and puzzles, physics probably tickles your fancy. There’s a great deal of creativity involved in uncovering lines of cause and effect. Here’s one puzzle that me and my friends in undergrad would pitch to newbies:

Start with a room. The room has no windows and one door. Inside the room is a lightbulb. Outside the room there are three switches. One of the switches turns on the light. You are allowed to open the door once, but you cannot flip any switches while the door is open. So, you could open the door while one of the switches is flipped on, but you can’t flip the switch off or flip on another switch until the door is closed.

How do you find out which switch turns on the light?

There’s a hint and more riddles after the jump.

Here’s one I love.

The hint for riddle number 1 is that finding the answer has to do with heat. The hint for riddle number 2 is, try to figure out what question they will both give the same answer to.