population inversion of laser

population inversion of laser
population inversion
The condition of having enough excited or high-energy states distributed in a material that a chain-reaction of stimulated emission can occur. Lasers, for example, need a constant power source that maintains population inversion in order to generate radiation continuously, since each stimulated emission reduces the population of high-energy states. See also stimulated emission.
In science, specifically statistical mechanics, a population inversion occurs while a system (such as a group of atoms or molecules) exists in a state in which more members of the system are in higher, excited states than in lower, unexcited energy states.
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best explanation

[@manasayanaki1299]

Thankyou so much sir ...I think u dont believe that I have exam today and I watched it vedio about population inversion and I get this qxn in my exam..it's unbelievable.. I wrote that what I listen from Ur vedio...thankyou so much

[@ahmadsaid5845]

manasa yanaki False guy

[@michaelgloria1682]

Will the electrons in the metastable state move to a higher energy state if supplied with energy?

[@yashii5903]

Is it possible to supply energy to the metastable state??

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Sir, plz continue some topics of semi conductor

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Sir make a video about semiconductor diode laser..your explanation is excellent

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good video, thank you

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[@iqrakhan560]

Why population inversion is necessary in a laser system? Please answer

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[@grenade1878]

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[@chanvika_6994]

But how can an electron return to it's ground State from a metastable state sir?electron transmission is banned in the metastable state na?

[@eshakhan2830]

because of the stimulated emission process i think so, not sure

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[@enthusiastic45]

Nice video 👍👌 sir sir stimulated emissions ka video banayiye

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very nicely explained thankyou:)

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Gud video☺☺ clear this concept so easily

[@sidharthakumarsahoo2801]

Physics related videos upload kijiye sir

[@aadilbhati6708]

Thankyou sir please write on some thoury topic

[@scienceathome4426]

In all the lectures of population inversion they say atoms instead of electrons...what is the correct one can anybody tell me please?

[@runuroychowdhury6825]

elections

[@bharath4884]

electrons

[@samathaallu8175]

Electrons

[@tharunreddy8471]

Sir please give a lecture on co2 laser !!!!

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[@vishalgowtham896]

Very helpful , thank you sir

[@TejaswaniARTS7340]

Sir why we are calling E2 is metastable state and what is the meaning metastable state

[@shravankumarkushvaha7079]

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[@sanathshetty9130]

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[@SARDAPRANEETH]

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Well explained

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sir please make a video on topic broadening

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[@kumarpurushottam632]

Thanks a lot sir

[@David-hw7uj]

Are Metastable state and excited state same?

[@AniketPatil-gm7kw]

Life span of atom in excited state is 10^-8 seconds and in metastable state is 10^-3 that's more than excited state.

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Amazing

[@itshari5489]

Thanks sir ...

[@Sana_rover]

You are saying atoms, actually, it's the electrons. Also, according to Pauli's Exclusion principle, two or more electrons cannot occupy the same quantum state. Then how can u achieve population inversion in the same metastable state? Can You please explain it.

[@afshankhalid809]

During transmission from E3 to E2 why there is no emission of photon?

[@cottoncandy4423]

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[@surbhikakumari7581]

I would like to correct you that its not the atoms that move on supplying energy, it's the electrons which move. Atoms are immobile.

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How we will achieve Metastable state in atom ?

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Sir metastable state ki proper definitionto baye plz

[@manoharlekkala2753]

Population inversion is done in excited state or meta stable state

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this doesn't explain metastable state clearly. Very very basic.

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Sir please explain Ek diagram

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Electrons or atoms

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Its electrons, not atoms.

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Thank you sir