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.
The RFLKT is the easiest to use bike computer and it is fully compatible with the most popular cycling apps including Wahoo Fitness, Strava, Map my Ride, Cyclemeter, and Ride with GPS. Big, Customizable Screen With 70% screen, the RFLKT has the highest screen to computer ratio in the market.