A semiconductor device that converts electrical energy into light or infrared radiation in the range 550 nm (green light) to 1300 nm (infrared radiation). The most commonly used LED (see illustration) emits red light and consists of gallium arsenide-phosphide on a gallium arsenide substrate, light being emitted at a p-n junction, when electrons and holes recombine (see recombination process). LEDs are extensively used for displaying letters and numbers in digital instruments in which a self-luminous display is required.
Light-emitting diode
- coulomb
- Coulomb field
- Coulomb force
- Coulomb's law
- Coulomb, Charles Augustin de
- counter
- couple
- coupling
- coupling constant
- CP invariance
- CPT theorem
- CPU
- creep
- critical angle
- critical damping
- critical mass
- critical pressure
- critical reaction
- critical state
- critical temperature
- critical volume
- CRO
- Crookes, Sir William
- cross product
- cross section