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  | | SEPTEMBER 6, 2015 |  | | Telephone game | When you were a kid, you may have played the game in which you used two empty tin cans and some string to make a “telephone” so you could talk to a friend from a distance. When one person spoke into a can, the other person could hear their voice in their own can, and vice versa.
It's a very simple experiment in sound energy and how waves work — the vibration of one can makes the string vibrate, and this vibration is picked up and amplified by the other can. It doesn’t need any outside energy source or magnets or other tricks.
If you never did this as a kid, I would tell you to try it now just for fun. Except that, if you have a dog, you're playing the tin can telephone game every single day — or you should be... |  | | | | © Copyright 2015 Cesar's Way, Inc. All rights reserved.  | |