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.
Aries 2051001 Running Boards - Polished, Stainless Steel, Direct Fit new. Upgrade the functionality and safety of your pick-up in a serious way with these angular, modern nerf bars by Aries. These AdvantEDGE bars are made of 5.5-inch wide aluminum and feature a stamped tread to keep your feet from slipping.