LASERS Session 1 (Spontaneous Emission, Stimulated Emission, Light Amplification) noise reduced

LASERS Session 1 (Spontaneous Emission, Stimulated Emission, Light Amplification)
*What does LASER stand for? In what respect it differ from an ordinary source of light?
*How LASERs are different compared to X-rays?
*Differentiate between spontaneous emission and stimulated emission of radiation.
*Define absorption. What is its role in a laser system?
*What is population inversion? Explain its significance in the operation of LASER.
*What is pumping in laser? Mention the types of pumping methods.
*Differentiate between stimulated emission and spontaneous emission.
*What is the role of resonant cavity in the operation of laser?
*Define - absorption, spontaneous emission, stimulated emission, metastable state, population inversion
Notes on this topic are available here : drive.google.c...

[@vyassaumya2083]

watching it just day before my end semester exam, very helpful👍🏼

[@EngineeringPhysicsbySanjiv]

All the Best 👍

[@NeerajKumar-gg9pz]

thank you and love you sir you are literally saving me in my end term exam love from jammu (nit srinagar cse)

[@EngineeringPhysicsbySanjiv]

Most welcome.. keep watching and share with your friends..

[@gghghghhg1575]

bhaijan srinagar main kaise halat hain abhi....sab plan ke hisab se chal raha na....koi dikhat aaye tou abdul ko yaad zaroor kijityega

[@prathameshkadve9144]

Beautiful Explanation Sir.... Your animations are self explanatory... Your Teaching is boon to students who couldn't get admissions in renowned institutions....But ur channel provides Quality Education.. Very Impressive teaching sir👍

[@EngineeringPhysicsbySanjiv]

It's my pleasure.. keep watching and share with your friends..

[@nitesh3955]

is this college under deemed university

[@EngineeringPhysicsbySanjiv]

No.. not yet..

[@abhionyoutube792]

Sir it's really interesting with many animations and gifs. Thank you sir

[@EngineeringPhysicsbySanjiv]

You are most welcome

[@prajjawalsingh4952]

Explanation I did not understand on my college nit trichy but your teaching style so amazing

[@EngineeringPhysicsbySanjiv]

Thank you.. please share with your friends also..

[@DeepSingh-wo1tt]

Excellent!! Sir I am studying CO2 laser , I want to calculate : 1) Cavity dimensions with gas volume and its input power requirement 2) Its output power 3) Gas pressure Hope you help me, I shall be very thankful to you

[@EngineeringPhysicsbySanjiv]

Sorry, but I am teaching at the basic level.. so i have limitations.. your requirement seem to be in the research area.. If I come across any person doing work in CO2 laser, definitely I will suggest you..

[@whattolookfor5788]

Hello Sir, I am from Noida. Sir I am in Btech(2nd sem) sir I watched your videos for interference and lasers and fiber optics in my 1st sem exams and got 9/10. Sir for 2nd sem my course is (Kinetic motion of gases, thermodynamics) and (crystallography and semiconductors) Sir you have uploaded videos of 2nd unit (crystals and semiconductors) but not of 1st unit. I want videos series of kinetic motion of gases and thermodynamics(physics) sir please my exams are in april end or may start 2023. I need the videos series before that.. please sir please upload it fast. Thankyou very much sir for your help in 1st sem.

[@EngineeringPhysicsbySanjiv]

Thanks for watching.. but new videos are bit difficult now.. i am currently working on a new project..

[@jallikakavya6317]

superb explanation sir easily understandable and it is easy to remember with animations thank you so much sir

[@EngineeringPhysicsbySanjiv]

Thank you for the compliment 🙏

[@MiniRao]

Your teaching is really good and great sir Thank You

[@EngineeringPhysicsbySanjiv]

Thank you🙏

[@whattolookfor5788]

Sir please make a video series on kinetic motion of gases and thermodynamics (physics) for engineering 1st year students

[@armyattendance7580]

Thank you so much sir This would be helpful for us especially online

[@EngineeringPhysicsbySanjiv]

Most welcome.. glad to know you find it helpful.. please share with friends also..

[@armyattendance7580]

@@EngineeringPhysicsbySanjiv Ive shared it sir..☺️

[@pratappaode7240]

Sir, do you have a series on electromagnetism that covers The Lorentz force law, Biot-Savart law, magnetic Vector potential, boundary conditions, multipole expansion of vector potential, magnetization, magnetic materials, torque and forces on magnetic dipoles, field of a magnetized object, the auxiliary field H, boundary conditions, linear and non-linear media Electrodynamics: Electromotive force, electro-magnetic induction, Application of Maxwell's equations, boundary conditions

[@rpprogrammer4511]

Thank you sir for making such video... Very useful video ❤🙏

[@EngineeringPhysicsbySanjiv]

Most welcome.. Best luck to you.. please share it with your friends also..

[@jenyjoy6898]

I could clearly understand Thank you Sir☺

[@EngineeringPhysicsbySanjiv]

Most welcome.. please share with your friends also..

[@akashrameshpattar]

Thank you so much sir i am from karnataka

[@EngineeringPhysicsbySanjiv]

Great.. all the best

[@SunilKumar-eh1ie]

Nice explanation sir Its easy to understand......

[@EngineeringPhysicsbySanjiv]

Glad to hear that.. keep watching.. share with your friends also..

[@RugvedhTallapudi-lk9jy]

Excellent 👌 explanation sir.

[@pranshisharma9669]

love the lecture thankyou sir

[@EngineeringPhysicsbySanjiv]

Most welcome.. please share with friends as well..

[@fletchergull4825]

Very helpful mate thank you

[@sofia-zq5co]

Sir you are awesome .. what a great explanation

[@EngineeringPhysicsbySanjiv]

Thank you for the complement.. please share with your friends also..

[@vikashs355]

sir I am a teacher in a government school..........what app / how do you edit your videos........btw superb explanation........

[@EngineeringPhysicsbySanjiv]

It is simple power point presentation with narration recorded

[@better_then_before]

Sir if given Photon is absorbed by atom then how there are two Photon emitting????🤔🤔

[@EngineeringPhysicsbySanjiv]

In stimulated emission the photon is not absorbed.. It just pushes the atom in higher energy state and moves ahead.. so it is not lost.. in addition one more photon is obtained as the atom falls from higher energy state to lower energy state..

[@better_then_before]

@@EngineeringPhysicsbySanjiv thank you sir 🙏💕

[@sayedmariya9636]

Sir what is the actual meaning of light amplification by stimulated emission of radiation???

[@EngineeringPhysicsbySanjiv]

Meaning of light amplification is number of photons in light beam increase by large number. So intensity of light is very high.

[@abhishekpurohit3900]

Thank you so much sir. Deel❤️💕💕se thanyawad sir ❤❤❤❤❤🎉🎉🎉🎉🎉🎉🥰🥰🥰🥰🥰😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊

[@aynazfatima4266]

Excellent explanation...thank you, sir

[@EngineeringPhysicsbySanjiv]

You are welcome..

[@nehasatya4882]

Thank you so much sir This was so helpful

[@EngineeringPhysicsbySanjiv]

You are welcome

[@Your_Soul_Satisfaction]

the way ur explaining is really good for students to know better...

[@EngineeringPhysicsbySanjiv]

Thank you.. glad to know that it is helpful...

[@chanchalbokoliya8589]

very important video. thank you. skir

[@EngineeringPhysicsbySanjiv]

Most welcome..

[@husainchampawala4773]

Thank you sir😊

[@EngineeringPhysicsbySanjiv]

You are welcome..

[@ashwanthdurairaj7148]

Awesome session

[@EngineeringPhysicsbySanjiv]

Thank you🙏

[@PhysicsBanglaTutorial]

Thank you sir

[@EngineeringPhysicsbySanjiv]

Welcome.. please share with friends also..

[@rijuwanahaque8054]

Hello sir plz add more videos related to laser.

[@sandeepgodiyal5686]

Sir, Lucid explanation...

[@EngineeringPhysicsbySanjiv]

Thank you🙏

[@balajidodda5627]

Awesome videos!

[@EngineeringPhysicsbySanjiv]

Thank you

[@sureshbadadani5698]

Thank you so much sir 😊

[@EngineeringPhysicsbySanjiv]

Most welcome.. share with your friends also..

[@yadagirigiri9260]

Very nice sir

[@EngineeringPhysicsbySanjiv]

Thank you and best luck to you👍

[@Prajwal_Birwazz_11]

Nice explanation sir 👍

[@debanjanghosal618]

Respected Sir, I've a doubt: Why we are considering atoms in energy levels rather than electrons?

[@jaiadityachaudhary431]

great video sir

[@EngineeringPhysicsbySanjiv]

Thank you..

[@SatwikTiwari-f3z]

Gud explanation

[@D.KrishnaPriya]

can we make any energy level as a metastable state

[@mandyachandu1217]

Can we it as pdf notes

[@EngineeringPhysicsbySanjiv]

Notes are available in description. If you do not get, let me know..

[@madhavansanthosh464]

Classy😌

[@EngineeringPhysicsbySanjiv]

Thanks

[@jay_726]

barabar

[@hooman3669]

❤

[@EngineeringPhysicsbySanjiv]

Thanks

[@hooman3669]

11:33

[@king-ik8il]

3:30

[@vaibhavshukla5354]

Lnctian

[@EngineeringPhysicsbySanjiv]

🙏

[@thripuranjalik]

Explanation is not clear......

[@SSPavailable]

Sir thoda too voice increase karlo aisa chuhe ki tarah bolte ho ki kuch sunai hi nhi deta 😂😂😂 isko negative review mat lena ise apne aap ko improve karo jor se bolo

[@Your_Soul_Satisfaction]

sir is there any X-ray chapter in ur playlist

[@EngineeringPhysicsbySanjiv]

Not on X-ray production. But there is a chapter on use of X-rays in crystallography.. kzbin.info/www/bejne/aZLZcqCEgrtqgKM

[@deadpoolsubodh8457]

Very good explanation sir. But i have a doubt at 23:33 isnt it better if the stimulated emission is instantaneous instead of occuring after some time lag?

[@EngineeringPhysicsbySanjiv]

Spontaneous emission occurs after the life time of the atom in excited state is over. And this life time is usually is very low of the order of 10 ns. In case of stimulated emission, it may occur earlier. but for it to occur earlier, external agent is required. More life time is needed for considerable stimulated emission due to which light amplification can be achieved.

[@deadpoolsubodh8457]

@@EngineeringPhysicsbySanjiv Understood sir.Thank you

[@EngineeringPhysicsbySanjiv]

👍