Secret Code Send a message in a secret code. Time Share Listen and adjust sampling rates of 2 conversations being transmitted over one telephone line. Wire Telegraph Send or receive a message using Morse code. A device helps with timing and decoding. Thermal Images Infrared radiation emitted by our bodies is invisible to our eyes, but can be seen with the special camera in this exhibit.
Visitors can turn the camera to see themselves or other visitors nearby.
UV Shades Notice how different materials, such as glass or cloth, block ultraviolet radiation. Visitors can insert their own sunglasses into a chamber and see the amount of ultraviolet blocked on a monitor. Tones, Pure and Simple Use your voice or a piano keyboard to make simple and complex waves. See, hear, and compare the shape of the waves on an oscilloscope. Jump to top of page.