Photo by Aaron Keegan, WWC class of 2005
|The transistor is perhaps
most significant technological development of the 20th century.
The transistor was invented in 1948 by John Bardeen and William
Shockley, and Walter Brattain who shared the Nobel Prize in Physics
only 8 years later in 1956.
The transistor is the black "D-shaped" object in the center of the photo. The transistor in the photo is connected into a circuit which is used by the physics class at Warren Wilson College to study the properties of this device. The transistor consists of three parts: emitter, base, and collector. These three regions are all parts of a tiny piece of solid silicon, but have impurities to make them N-type, P-type, and N-type respectively.