The exhibit on the museum floor uses a neon bulb like the one
pictured above. Since most computer screens flicker just like
the neon bulb, it can also work with your screen. How well this
works will depend on the scan rate of your CRT (and how strong a
bronx cheer you can make!). This will not work with LCD displays
as they are too slow to -Stand about ten feet away from your
computer screen. Stare at the pattern above and give it a
rousing raspberry. Notice that the pattern seems to wiggle.
-Vary the frequency of your raspberry and watch -Wipe off the
screen! No part of screen is moving. Instead, your whole body is
vibrating, including your eyes. You can feel this vibration by
putting your hand on your head as you blow. The pattern on the
screen is flashing on and off 60 times a second or more. Because
your body is moving, your eye is in a different position as the
screen is drawn. As the image of the screen traces a path across
your eye, it looks like the screen is moving. You can get this
effect by blowing