Light is a form of energy which produced the sensation of seeing objects.Energy cannot be created or destroyed rather it can be changed from one form to another form.This means the visible light is changed from other energy type.
Yes this is right.Electrons are the cause behind the generation of light energy.Electrons are negatively charged particles which revolve around the nucleus of an atom in a definite orbit shell(K,L,M,N..).Each shell has a definite energy level and electrons revolve around nucleus with definite energy.
When an atom's electron get energy, it is energized or excited.The excited electron having more energy then it's original orbital energy, jump to higher energy level.Excited electron cannot stay in energized level for a long time so it prefer to come back to original shell from where it goes to higher level.
when it returns,the extra energy(equals to taken amount of energy) should be emitted as to gain it's own initial stage.This extra energy is emitted as packet of energy, 'photon' or visible light.In this way light is emitted or generated from electron.
When an atom's electron get energy, it is energized or excited.The excited electron having more energy then it's original orbital energy, jump to higher energy level.Excited electron cannot stay in energized level for a long time so it prefer to come back to original shell from where it goes to higher level.
when it returns,the extra energy(equals to taken amount of energy) should be emitted as to gain it's own initial stage.This extra energy is emitted as packet of energy, 'photon' or visible light.In this way light is emitted or generated from electron.
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