Led vs. Laser — What's the Difference?

A light-emitting diode (a semiconductor diode which glows when a voltage is applied)

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission of radiation".

A semiconductor diode that converts applied voltage to light and is used in lamps and digital displays.

Any of several devices that emit highly amplified and coherent radiation of one or more discrete wavelengths. One of the most common lasers makes use of atoms in a metastable energy state, which, as they decay to a lower energy level, stimulate others to decay, resulting in a cascade of emitted radiation.

Past tense and past participle of lead1.

A beam of radiation emitted by a laser.

Simple past tense and past participle of lead

(Sports)A ball or puck sent in a straight line at high speed

Under somebody's control or leadership.

A device that produces a monochromatic, coherent beam of light.

Of a farm, etc.: managed by a deputy instead of the owner or tenant in person.

A beam of light produced by such a device; a laser beam.

Of Lead.

A laser printer.

Diode such that light emitted at a p-n junction is proportional to the bias current; color depends on the material used

A gum resin obtained from certain umbelliferous plants.

Such a plant.

To cut with a laser.

(sports) To throw or kick with laser-like precision.

A device which produces an intense, usually narrow, monochromatic beam of coherent light; called also optical maser. It has various forms, and is used in various applications in science and technology. The beam is produced by boosting the majority of the electrons in specific radiation-absorbing atoms in a medium into a higher energy level, from which they are stimulated by their own emitted radiation to drop back synchronously to their lower energy level, and emit light which is in phase (coherent).

An acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light