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.
An All-Wheel-Drive Burnout Machine Built to Break YouTube: Gymkhana Seven. Ken Block, co-founder of the DC Shoe company, rallycross driver, and all-around action-sports junkie, altered the world of YouTube forever when he released Gymkhana Practice in 2008. The 4-minute, 26-second display of driver skill, tire smoke, and speedâshot at the Marine Corps Air Station El Toro in Californiaâfeatured Block in the driver seat of a 500hp, all-wheel-drive Subaru Impreza.