Differentiate between LED and zener diode

Differentiate between LED and zener diode

LED	Zener diode
(i) A light-emitting diode is a diode that gives off visible light when forward bias.	(i) A zener diode is a p-n junction semiconductor device designed to operate in the reverse breakdown region.
(ii) Light emitting diodes (LEDs) are electroluminescent and give off light when forward biased.	(ii) Zener diodes have a specific breakdown volt so are often used reverse biased as a volt regulator.
(iii) The light emitting diode is polarized DIRECTIY, is light.	(iii) If zener diode is polarized INVERSE, the voltage between its end is always the same, no matter of the input voltage because of high number of in purities.
(iv) LED will emit photon when excited will have a low voltage reverse breakdown.	(iv) Zener diode will not emit photons will have greater reverse voltage breakdown.