PROJECTS COUNTRY SCIENTIST
TIME: 1 HOUR COST: $5–$10
How to Use LEDs to Detect Light
Written and photographed by Forrest M. Mims III
Forrest M. Mims III
Since an electromagnetic telephone receiver can double as a microphone, can a semiconductor light detector double as a light emitter?
That question was on my mind when I was a high school senior in 1962. Back then I didn’t know that quantum effects in a semiconductor are unrelated ...