When de-excitation of electron occur it comes to a high potential energy state than the ground state that is called meta stable state

By

Raman zada

Carbon is one of the elements which exist in meta stable state.

Diamond is the meta stable state of carbon, which upon given certain activation energy, changes into graphene.

all the electrons moving in their orbits have their natural frequency at which hey vibrate. in meta-stable state, when a photon of energy (equal to difference of energies b/w meta-stable and ground state) , electron starts to vibrate at their natural frequency. as a result its amplitude increases, and it moves to ground sate.

Latin:

"meta-" = change of state "morphic" = shape

"Meta" in Maori can mean "change" or "transform." It is often used in a contextual or metaphorical sense to refer to a transformative process or a state of being changed.