Laser class 12 | Spontaneous and stimulated emission | Population inversion and laser action

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6 ай бұрын

Laser class 12 | Spontaneous and stimulated emission | Population inversion and laser action
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Пікірлер: 141

@shamsulqamarehsaas4641 6 ай бұрын

Father of physics ❤🎉Atif Ahmad❤❤🎉🎉

@WaqasKhan-ps8vz 6 ай бұрын

Absolut

@muhammadnuzaifkhan1287 6 ай бұрын

No doubt Noone puts more effort into thier video than him... He deserves a standing Ovation

@user-yo9yv3yq8g 5 ай бұрын

Father nhi grandmother

@SaadAli-sc5se 4 ай бұрын

Correct❤❤

@ahmedmujtaba1140 2 ай бұрын

😂

@syedauzmawajahat4163 6 ай бұрын

SIR MEIN BILKUL ABHI ABHI YEHI TOPIC PARH RHA THA EK DAM SE AAPKI VIDEO KA NOTIFICATION AAGEYA 😂😂😂

@Hunniakhan739 4 ай бұрын

Thank uh soo much sir❤❤❤ Allah apki hr dua qabool farmaye Allah apko zindagi k har mor par qamyabi aata farmaye k ap hum bacho k liye etna karty hai ❤❤❤❤❤

@WaqasKhan-ps8vz 6 ай бұрын

KZfaq best and my favourite teacher all over the youtube may he live long to make this type of lectures❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

@UsmanKhan-jr8ct 6 ай бұрын

Sir with all due respect,kindly upload Nuclear physics as well,kiu ke wo zra tricky chapter hai aur lengthy bhi..baqi videos are A1 Ma Sha Allah 💜💜💜💜

@usernamestd-tn6zo 6 ай бұрын

Assalamualaikum sir Thanks to alot sir Your lectures are really appreciated ... Allah apko iska ajar de Ameen sum Ameen But sir plzz chapter 20 bhi jalde se upload kar dein ....plzz It's a humble request

@laibaabbas4452 4 ай бұрын

Thanks sir for these amazing lectures Plz upload lectures of unit 20 as soon as possible

@user-bi3nf1zc4r 4 ай бұрын

ALLAH APKO HUMESHA KHUSH RKHE SIR G🌷💓💝💫🌼

@user-bi3nf1zc4r 4 ай бұрын

💞💯

@user-bi3nf1zc4r 4 ай бұрын

@user-zp1wi2np8w 4 ай бұрын

Thank you sir .....Allah apko Zindagi ki har moor per kamyab kre ..you are my favorite ❤❤❤❤

@muhammadyousif4947 5 ай бұрын

The Legend of physics SIR ATIF AHMED ❤❤❤❤❤❤❤.....

@sanaejaz8202 5 ай бұрын

sir, you are great.... keep going....we all appreciate your hardwork....stay blessed🤲💞

@user-wg6mj2uf9z 6 ай бұрын

Aoa sir,you teach amazingly well, kindly upload all lectures. You teach with clear concepts.

@junaidstatus-js3539 6 ай бұрын

Sir Please Esi Month Last chap khatem krain q kay Agy papers hain😭😭

@AqsaTariq979 4 ай бұрын

MashAllah excellent sir❤you put a lot of effort in your every video that my each concept is completely clear 😊Allah Pak apko apki mehnat ka sila dy or hmain b kamiabi dy❤❤❤❤❤❤May you live long 💖❤️🥰🥰

@Faizan-114 6 ай бұрын

Thank you so so much sir ❤ , you are a blessing for us❤. Please upload all lectures as soon as possible

@syedaayeshahussain0886 6 ай бұрын

I have no words to Thank you Jazakillah 😊 You are Superb

@user-lp8qu9pq1d 6 ай бұрын

Really got concept of topic thanks sir for this help 😊

@user-rz3ro6so4o 3 ай бұрын

Sir lecture is superb May Allah bless you and your family a lot❤❤

@user-ny9lt5if5c 6 ай бұрын

Thank you so much 😊😊isi lecture ka wait tha

@user-kf2sc4hd8i 6 ай бұрын

A great physics teacher Atif Ahmed ❤❤❤❤❤

@Pashascience 4 ай бұрын

Thank you so much Sir for this Outstanding lecture ... JazakaAllah ...

@user-cy2bt7du1h 4 ай бұрын

mashallah very good lecture. i have taken lectures of three chapters from you. I think you should also introduce mdcat classes and dive deep into topics!

@AimanRizwan-gd4ry 6 ай бұрын

Excuse me sir kindly upload last chapter nuclear physics i really need it plzz upload as soon as possible... Roz aik topic upload kr diya krein na us ka plzz april m exams hain... Aur mujhe abi course cover krna ha sirf ap k lectures ki samjh ati ha

@Ytagmail 2 ай бұрын

Thanku thanku so much sir after papers I will like your all videos ❤❤❤❤❤

@GOLDCRACK-bk1zd 6 ай бұрын

SIR please upload chapter 20 class 12 thank you sir

@Awarenes.avenue5 5 ай бұрын

Thank you sir for your efforts!!

@user-wc7ii5mv2u 4 ай бұрын

You are the best teacher of physics ❤

@farhanaalizai1947 6 ай бұрын

Thank you so much sir Main ne second year apke lectures se parhi ha. Ap please lectures jsldi upload kiya karen hsmre papers kareeb a rhe hn . Collage main itna acha nhi parhate. Allah pak apko salamt ralhe

@Hubtp34 2 ай бұрын

God bless you sir you deserve a protocol more than American president ❤🎉

@MusabUllah-ce6km 6 ай бұрын

Sir may Allah give you many successe , Aameem . I pray that u achieve 200k subscribers soon and in a short in terval 1M also 😊. Your way of teaching is superb , my concepts are clear from ur lectures , Thanks sir 😊....

@ClashKing-gm2cf 2 ай бұрын

Hats 🎩 off to u sir .....u r truly a Diamond 💎 .... delivering a 1 hr lecture without taking break 😢 ....I literally cant describe ur dedication towards students .....I'm at a loss words....❤

@ayeshach4563 5 ай бұрын

Thank you sir kamal ka smjha dea😊

@Bilalmunir12 6 ай бұрын

Meri shan meri Ann, Atif Jan Atif Jan...

@uzmastar6351 4 ай бұрын

Interesting lecture sirg

@AhmadKhan-du9vb 4 ай бұрын

Jazak Allah 🥰 sir

@FutureDoctor790 4 ай бұрын

THANK YOU SIR G LOVE AND RESPECT ❤❣️❤

@Abdulgaffar-ry3xe 6 ай бұрын

Sir kindly 1. Phy of solid 2. Nuclear phy Yay do ch as soon as possible upload krden❤

@user-vo8lt3xl4w 6 ай бұрын

hystresis lop important hai ba usme i think

@whoisstronger462 2 ай бұрын

Han koi Acha KZfaqr ha jo acha sa smjha da parso paper ha@@user-vo8lt3xl4w

@quratulainraza1415 6 ай бұрын

jazakallah sir

@JAN-he7cx 2 ай бұрын

Kal paper hai aur aj ye parh rha 😍😍

@arinamirkhan2606 2 ай бұрын

Same😅

@user-vo8lt3xl4w 6 ай бұрын

thanku sir❤

@user-os4vg6hw4g 6 ай бұрын

Sir jee lambi umer jeoooo huge respect for u apni physics ki maam tou aps wali ajeeb basha bolti ha samajh nahi aata

@swaggerbois_56 6 ай бұрын

😆

@younisfreefire8716 4 ай бұрын

Thank you so much 👍

@maryamwazir9024 3 ай бұрын

Mashallah great sir great lectures

@user-cx5qn1hi7r 6 ай бұрын

Thank you sir, i am in 9 grade and your videos really help me alot!

@zainabneedshelp 6 ай бұрын

12 ki physics kyun parh rha

@user-qw6nf4vk3m 6 ай бұрын

Thank you ❤❤❤❤🎉

@RandomAF190 4 ай бұрын

Best leacture🎉🎉😊

@user-nu6ek6wk8d 3 ай бұрын

Amazing teacher❤❤

@salehksung5248 5 ай бұрын

Aoa Sir, Metastable state mein likha hai k "electrons stay in this state for a longer time before *spontaneously* falling to ground state" but sir spontaneously tou woh fall nhin karte woh tou us photon ki wajah se ground state mein jaate hain jo hum ny send kia hai i.e humari taraf sy bhejy gaye photon ki wajah se stimulate ho kar electrons de excite hote hain

@emaanfatima8884 5 ай бұрын

31:06 sir but stimulated emission me jb hum photon ko electron se strike kerwate hein to electron ko to us photon ki energy absorb ker leni chahie or energy absorb ager vo kerta he to phir wapis ground level per kiu aa jata he?

@user-pi2jj7hy5w 4 ай бұрын

Sir stimulated emissions mein photon dena sa kiya electron mazeed excite nahi ho sakta?

@ahmadraza212 4 ай бұрын

Great sir

@user-wc7ii5mv2u 4 ай бұрын

Thank you so much sir ❤❤

@abdulghafargopang5545 6 ай бұрын

Sir Excellent But please fluid dynamics A/c to Sindh text book ke lectures upload karein

@bushramalik9062 4 ай бұрын

Thanks 👍👍👍💗

@saleemhussain8246 6 ай бұрын

Sir Fluid dynamics ke lecture upload kare Sindh Text book ke upload kare please 🙏 please 🙏 please 🙏

@WaqasKhan-ps8vz 6 ай бұрын

Kpk wala sind wala nhi apna teacher talash kare

@Bilalahmed-ck2sp 2 ай бұрын

superb

@GirlIamNotToothless 6 ай бұрын

Sir aapne 11 class Physics, chapter "waves" mein "periodic waves" ka topic cover nhi karwaya abhi tak.

@ITs_Hunny_Editx 6 ай бұрын

Sir plz upload chapter nuclear physics lectures.Its a request plz sir,🥹😭

@Abdulgaffar-ry3xe 6 ай бұрын

Kindly pehly 2nd year phy ky upload krden phir baki classes ky JazakAllah

@WaqarKhan-rf7ib 6 ай бұрын

Sir jb electron E3 se E2 me ayega to photon release karega ya nhi

@NawalKhan-rd4yn 6 ай бұрын

Assalamualaikum sir how r u ❤ sir plz upload next lecture on "Meta stable state" ...... 🤗

@Al_Nusrati 4 ай бұрын

Sir unqy screens shots to dedein, jis tarah last video ma dia tah woh full clear tah

@zuhaibshaukat8055 3 ай бұрын

Sir jis tarah aap ny ye notes banye hai isi tarah hum board mai leekh salty hain kya??

@Islaminworld. 6 ай бұрын

Assalam o Alicum Sir Sir ma Government College Peshawar sy hoon wahan k Students ap k videos dak tyy hy magar wa kahty hy k ap buhot bahter tareekhi sy explain karty mager ap MCQs nahi karty isly Government college peshawar k Students chahty hy k ap MDCAT k MCQs bee kary har topics k saat❤

@ShahnawazMuhammad 5 ай бұрын

Sir Plzz upload lecture about Ch 20 (Nuclear Physics)

@user-ve7qp4mz7z 6 ай бұрын

Sir please ap lectures ka sat class 12 ka numerical solutions ki b videos banyn

@user-bj1jk2sm5d 5 ай бұрын

Aoa sir g ! Physics ka chapter wise notes mill sakhty hain for federal board ? But a great 👍 teacher sir Atif Ahmad 😊❤

@fasihurrehman9498 4 ай бұрын

🙏

@AimanRizwan-gd4ry 6 ай бұрын

Sir helium neon wala topic ni ha aur sir ye jo last m voltage wala explain kiya ha is ki kuch khaas samjh ni aai... To kindly helium neon aur laser action jo voltage se hogi wo explain kr dein

@whoisstronger462 6 ай бұрын

Sir thora sa chota lecture bnaya kra plz

@taniamirza4209 5 ай бұрын

Sir kya hum is ko hi perpare kr sakhty papers k Lai???

@Fahad_TV_22 6 ай бұрын

Sir plz upload chapter 20 lectures

@AhsanUllah60 6 ай бұрын

Sir your student Ahsan ullah assalamualaikum

@muhammadismailhussain186 6 ай бұрын

A.o.A sir, Aap ne kia chp *physics of solids* upload Nahi Kia Pls reply

@Attitude_breaker1 2 ай бұрын

Naseem shah of physics 🔥💯😌

@NATURE--OWN 5 ай бұрын

concept developer SIR ATIF AHMED

@afnanktk911 6 ай бұрын

sir plz upload nuclear physics lectures

@user-dk1xl4im5s 6 ай бұрын

❤

@WaqasSoomro 5 ай бұрын

At both sides we use mirrors which reflect the incident photons, then how the photons are coming out of this device in the form of laser ? And why we are using Semi- silver Mirror at one side ?

@saifmalik6724 4 ай бұрын

at one side we use semi reflecting mirror which allow laser to come out from the device

@rajanafees9711 6 ай бұрын

Sir please jaldi upload karain lectures ko please 🙏 🙏

@hurariihuaia7590 6 ай бұрын

Sir❤

@Shalovlogs 6 ай бұрын

Sir maths bhi parhain please 😊😊😊😊😊😊❤❤

@rashidpervaiz-ho7qp 6 ай бұрын

SIR important topics per video dy

@AfnanKhan-uo3lr 5 ай бұрын

❤❤❤❤

@user-bf7uc5nf7t 6 ай бұрын

Aoa.sir if energy is given to the electron in the metastable state then why it is not moving above to the higher level,instead of falling to the ground state (stimulated emission).plz if possible then answer

@KalamNaran 6 ай бұрын

because the incident photon energy match with the meta stable and ground state energy difference and the reason why it not going to higher energy level because energy difference between higher and meta stable state energy difference do not match with incident photon energy this is called resonant energy matched

@sanaejaz8202 5 ай бұрын

sir waiting for nuclear physics' notes☺

@Annan72 6 ай бұрын

Sir 11th class Chapter 10 (Thermodynamics) ka last topic refrigerator and entropy Krwa dein Please

@zimmalusman1267 6 ай бұрын

Sir plz upload chp 16 and 20 soon

@muhammadismailhussain186 6 ай бұрын

A.o.A sir, Aap ne kia chp *physics of solids* upload Nahi Kia

@user-bj1jk2sm5d 5 ай бұрын

Pdf Ki shape ma agr mill sakhty Hain tu please sir link bhjh dain 😊

@raoqamarnawaz9101 6 ай бұрын

Sir can u help in maths notes of class 11 and 12

@umarausman5626 6 ай бұрын

SIR please tell mcqs of 11 and 12 class plsssssssss

@user-bj1jk2sm5d 5 ай бұрын

Sir please reply about for physics notes?

@msa006 5 ай бұрын

Sir chap#20 ki vid kb dalle ge? 😢

@FazalMola-ur8ns 2 ай бұрын

❤❤❤❤❤🎉🎉🎉🎉🎉🎉

@Letsdiscover-fv8ke 5 ай бұрын

Nice❤❤❤❤❤❤❤

@user-du9fr9fo7e 6 ай бұрын

Aoa Sir please chapter # 18 Ka topics Ka bhi lecture upload Kar den Operational amplifier, OP-AMP as inverting Amplifier, OP-AMP as non-inverting Amplifier and Gates Plz plz sir in topics Ka lecture Karwa den plz