There are two quite different kinds: CFLs (compact fluorescent lamps) and LED (light-emitting-diode) lamps. What's the difference between them, how do they work, and which is best? Let's take a closer look!Photo: A typical dimmable LED lamp. Light comes from a ring of tiny LEDs ...
It shines a bright light down onto your desk from an LED (light-emitting diode) mounted on the bottom of the mouse. The light bounces straight back up off the desk into a photocell (photoelectric cell), also mounted under the mouse, a short distance from the LED. The photocell has a...
Describe briefly lhow light emitting diode is fabricated and expalin its working write three important advantages of LED over conventional incandescent lamps View Solution With the help of a diagram, show the biasing of a light emitting diode (LED). Give its two advantages over conventional incan...
1. Visible light, ultraviolet radiation, infrared radiation, radio waves. 2. Radio waves, visible light, ultraviolet radiation, infrared radiation. 3. Infrared radiation, radio waves, visible light, ultra A stellar object is emitting radi...
The light is produced by a light-emitting diode (LED); right next to it, there's a photoelectric cell—a component that detects the reflected LED light and turns it back into an electrical signal. As you move your mouse around, the pattern of red light reflected off the desk changes ...