In my Appliance Science column for CNet, I look into the fascinating physics of LED lights. It’s all about electrons, quantum physics, energy levels and water flowing downhill.
And, like a waterfall, interesting things happen at this point where the flow is controlled. Whereas a waterfall makes noise, electrons flowing across the pn-junction of an LED release light. As the electrons flow from the n to the p layer, the energy level of the electrons falls, dropping from the higher energy level of the p-type layer to the lower one of the n-type. This energy is released as a photon, which we see as light.
I am very pleased to announce that I am now writing a column for CNet, called Appliance Science. Illustrated by the awesome Colin McDonald, this column will look at the science behind an appliance, revelaing the mysteries of… Appliance Science! First up in this twice-monthly column is the refrigerator.
Welcome to Appliance Science, a new column all about the science behind your home appliances. You may not realize it, but your appliances are hotbeds of scientific progress, made possible by moon-shot class engineering and technology that would make your ancestors cry with joy. In this column, we’ll take you through the science and technology behind the appliances in your home…