Energy of a photon : E = hf The photoelectric effect works like this. If you shine light of high enough energy on to a metal, electrons will be emitted from the metal. Light below a certain threshold frequency, no matter how intense, will not cause any electrons to be emitted.
The Boogie Board Jot 8.5 is an uber-slim slate with a black 8.5â³ screen. The stylus clicks into the opening under the screen. When you use the stylus it writes on the screen in a bright green color. The company claims this board is 50% brighter than their previous Jot model.
try using it on a different surface--i never use a mouse mat--the best thing i have found is a 12 inch square linoleum tile--really smooth and hard wearing been using it 5 years now and its still good as new. Dec 16, 2011, 2:21 AM. the reason its choppy is because your settings do not match your screen.