LASER COMPLETE Engineering Physics_AKTU, LPU, SPPU

Important play list related with btech coures are as follows (2023-2024) batch
• ENGINEERING PHYSICS (Q... engineering physics
• Engineering Mathematic... electrical engineering
• Engineering Mathematic... engineering mathematics
• SRMU, Bihar AryaBhatt ... physics other indian universities
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in b tech first year physics /engineering physics/applied physics the optical fiber and the laser is last unit /module. this is the first part of the series.
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow.
A laser differs from other sources of light in that it emits light which is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers and lidar. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum. Alternatively, temporal coherence can be used to produce ultrashort pulses of light with a broad spectrum but durations as short as a femtosecond.
Lasers are used in optical disc drives, laser printers, barcode scanners, DNA sequencing instruments, fiber-optic, semiconducting chip manufacturing (photolithography), and free-space optical communication, laser surgery and skin treatments, cutting and welding materials, military and law enforcement devices for marking targets and measuring range and speed, and in laser lighting displays for entertainment. Semiconductor lasers in the blue to near-UV have also been used in place of light-emitting diodes (LED's) to excite fluorescence as a white light source. This permits a much smaller emitting area due to the much greater radiance of a laser and avoids the droop suffered by LED's; such devices are already used in some car headlamps

[@saurabhdeophilomath1257]

★ 0:00>LASER Characteristics. ★ 17:25->Einstein's co-efficient. ★ 23:03 --->Population Inversion. ★25:03->Schemes for Population Inversion. ★ 34:29 -->Properties of LASER. ★ 37:48→ He-Ne LASER.📝

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Thanks Saurabh

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Spr teaching sir 🙏♥️

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Sir notes bhejona

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Which Topics Are Not Included Koi Batayega??

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From attending Sir's lecture in class to seeing this video on KZbin. ❤❤❤

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This is not revision video . Mujhe class mae ye unit samjh ni arhi thi yaha 40 min all doubt clear

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Wow I am glad that it is helpful to you. Feel free to suggest me what topics or content i should consider for future videos.

[@devanshumishra6594]

Thank you so much Sir Huge Respect for you

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Welcome Devanshu glad to know that it is helpful to you.

[@ProGamer-bv2gq]

0:00--->LASER Characteristics. 17:25--->Einstein's co-efficient. 23:03--->Population Inversion. 25:03--->Schemes for Population Inversion. 34:29--->Properties of LASER. 37:48---> He-Ne LASER. THANK YOU 💖

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Thanks

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@@RGSClassesEssential you're welcome 🤗

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very good explanation sir absolutely loved it

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Thanks ajay

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Thanks for covering all the topics

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A huge thank you sir! ✨

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Sir plz make videos from all the topics covering Makaut curriculum, there are very few teachers on KZbin for us college students

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Great video... Thanks sir

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Thanks

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thanks sir for this quick revision .

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Welcome

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Thanks sir

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Loved this session sir ❤️ thnx alot!

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Thank You So Much Sir...❤❤❤ Full Respect 🫡🫡🫡

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Most welcome😊

[@AdityaChaturvedi-2005]

I am a first year student and watching this sir I remind me my best physics teacher on KZbin Mohit Goenka sir of eduniti Great video sir Thank you so much!!

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Thank you so much sir for the informative vedio it helped me in my exams a lot

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Glad to know that best of luck

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Very good explanation sir in very short time I understand all topics very easily

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This is very useful 👍👍

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Glad it was helpful!

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Thank you so much sir. 🙏🏻🙏🏻

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Best video for Laser. Thank You sir Because of this I was able to get good grades on my Laser Test. Thank You once again sir.

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Thanks a lot sir ! I’m in first year btech and it’s really helpful to me 🫶🏻👍🏻

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wow ! keep learning. your feedback will improve the content so feel fee to comment me. good luck.

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Amazing Teacher ❤

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Great explanation sir🔥🔥🔥🔥

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Thank u sir 4 saving my exam... ❤

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Awesome 👍

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thanks

[@aagmansharma2636]

Excellent sirji 🙏. Please make some more regarding Enginnering physics

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on this channel I have already uploaded many videos on engr. physics

[@Rajababu12395]

A lot of thanks sir

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Most welcome

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Class m smjh nhi paye the sir but aap itne ache se clarify kiye sab aa gya smjh m thank you so much sir ☺️

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Welcome 😊

[@vikashsrivastva4941]

Which book you would recommend for understanding mathematical part of population inversion?

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More detail is given in quantum electronics book say ghataks book a photonics books also included the detail discussion.

[@ano3000nymous]

Completed this chapter the night before exam...all thanks to sir

[@ashutoshjha6981]

Sir baaki chapters ke bhi one shot krwaye hai kya aapne ? Agar karaya hai to kya aap link provide kr skte ho please 🙏🏻

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Thank you so much sir, for this video.What an explanation! According to me it's great.

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Thanks

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Very precise video. Helped a lot. 👍👍👍

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thanks for watching and appreciating.

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Thankyou 👍

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It's my exam passing topic Thank you sir for this video ☺️

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Most welcome

[@ayanmukherjee9501]

@@RGSClassesEssential sir can you suggest some topic for achive passing marks only , I need only 20 Marks for passing my 1st semester exam

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Quantum, emt and superconductor only 2.5 units gave you passing marks ( even more than that)

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@@RGSClassesEssential thank you sir 💗💞

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this video helps a lot in my end-sem exam ........Thanks a lot sir 💞💖💖💖

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My pleasure, dear😌

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From Bangladesh, thanks a lot sir ❤❤

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thanks sir

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Thankyou sir

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Welcome dear

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Thank you sir ji , revision videos ko ek playlist bnado please sir

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Done please check. Keep updating me what you all required, i will try to include it. Thanks

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❤

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Thank you soo muchh sirrr mere college ke teacher ita sahi se smjhadete toh aaj mai top kr rha hota mere college mai😂

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Thank you so much sir ab kal ke exam me ho jaega laser😊

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most welcome

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Sir please engg physics ke important questions ka video bana do insem hai end of feb mai please sir 🙏🏻

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Please also make videos on 🥺❤️ *Diffraction* *Physics of sensors* *Nanotechnology* *Electrodynamics*

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Will definitely try

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@@RGSClassesEssential where is the video sir

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Sir IIT me hu..kal exm h😃😃aap gzb pura laser 40 min me padha dia❤️😍

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Glad to know that it is helpful. Good luck

[@saurabhdeophilomath1257]

🙏 iitian bhaiya ko

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Revision ❌ Full lecture ✅

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❤

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I given mid term in lpu with help of ur one shot video 80% i marked question.nice lecture

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wow, keep this performance in the future. I am glad that my videos are helpful to you. Please share the video and channel with your friends to support me. 🙂

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Lol lpu 1st year me marks nhi katega 😂

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Sir pls make videos on one shot videos of engineering chapters please sir no one is doing it in youtube (vtu- 2022 scheme too)

[@RGSClassesEssential]

Engineering chapters of what subject? For physics I am doing it. For old sessions one shot or revision videos are on channel. Please specify the topics, use mail [e-mail] for detail plan. Thanks for your interest 🙂

[@sameeronline6414]

@@RGSClassesEssential ofcourse for physics sir 😙 thanks for ur response sir

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Awesome teaching sir ❤️

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Oh thanks

[@yashbhandare9576]

@@RGSClassesEssential Please also make videos on 🥺❤️ *Diffraction* *Physics of sensors* *Nanotechnology* *Electrodynamics*

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Thankyou sir for your laser video ❤❤

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Welcome

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Thanks sir tomorrow my physics paper

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best of luck

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Exam se ek din pahle padha or exam nipta diya 40 min me 😂😂😂

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Goated lecture

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Thankx

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sir plz provide notes

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Sir please provide notes

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Sir please make revision video on band theory of solids

[@RGSClassesEssential]

Ok will try

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Send me syllabus

[@HimaniHatwar]

@@RGSClassesEssential Unit-: Band theory of solids Basic idea of free electron theory of metals, expression of conductivity of a metal. Formation of energy bands in Solids, Fermi energy and Fermi level. Classification of solids on the basis of energy band diagram: Conductors, Semiconductors and Insulators, concept of Fermi energy.

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👍🙏♥️

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Sir, notes nahi mil sakta hai?

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sir you are loking like Ankit awashthi sir.

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🙂 Hope unka jitne knowledgeable ho jaye, he is toooooo..good in his field.

[@TheYtHandle]

thanku sir for this lecture...@18:26 let n1 be the number of particle in ground state and n2 number of paricle in exited state ...mujhe lgta ye statement adhuri hai .. mere hisab see aaisa likha jana chahiye tha ki n1 number of particle ne absorption kraa.. and n2 number of particle ne ..spontaneous emission kra..jiske response me aur dusre n2 number of particle ne bhi stimulated emission kra.. equation dekhkr aaisa hi pratit hota hai. sir kya Maine shi direction me socha hai??

[@RGSClassesEssential]

Aap stimulated emissions ke liye jo radiation interaction responsible hota hai uska calculation bhi include kara cahte hai, possibly spontaneous process ke through. But this is not always possible, laser cavity ka rdiation bhi stimulation kara sakta hai so do baar n2 sochna ek specific situation ho sakta hai. But in actual paper einstein himself is bare me kuch nahi kahte. Ye maan ker ki radiation preexist hai stimulated emission define karte hai. Further quantum theory of radiation interaction with matter, transition matrix is process ko bahut acche se define karta hai by considering all such possibilities.

[@TheYtHandle]

@@RGSClassesEssential ohk sir... thank you for reply🙏

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Sir please make a video on acoustics and oscillations

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For what university syllabus.

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​@@RGSClassesEssential vtu sir

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nc

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exam ka agle din kon kon dekh rahe ho like karo

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Pichle*

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Mai

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Yes bro

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Sir Notes bhi share kardiya karo please

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Telegram banate hai to hi ho payega

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Please make lecture related to btech second semester

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Which subject

[@explorerashish6279]

@@RGSClassesEssential i am nit Hamirpur student computer science. Currently i am giving exam of first semester. So sorry sir i don't know that what subject will tought. First i confirms my teachers after exam then i will tell.❤️ Your way of teching is extraordinary sir. Thank you very much🙏🙏🙏🙏🙏🙏

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@@explorerashish6279 ok

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Which Topics Are Not Included Koi Batayega??

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Wah

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🙂kya comment hai, wah

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@@RGSClassesEssential nahi sir ji aapka padhya hua smaj aaya toh wah

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Thank you sir😊 28/04/2024

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Most welcome

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Notes

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Sir mu wale bhi yeh refer kar sakte haina??

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Ram Ram ji 🙏❤️

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Jai Sia Ram

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20:14

[@harekrishna78970]

Sir aapka koi course hain kya physics ke liye first year

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i have an app and different courses but not for Btech,full courses are for BSc students. You may download the app RGS Classes from play store to see some detail, where i am providing the PDF notes for btech physics

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Sir aap shm par bhi videos lao pls

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Which university??

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Sir ctae udaipur ke syllbus ke according h same

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I just downloaded your syllabus and observe that most of the course will be covered in the lectures available on this channel. Best of luck

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Sir can you plzz provide us the notes of this topic...?

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Sure I will try, let me search

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Mai to exam se 25 minit phle dekha rha hu 😅😂

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kitne tejashvi log hai hamare yaha

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This lectures is for mumbai university or not❤

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its helpful

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SIR PLEASE PROVIDE THESE NOTES

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It is an old video and i don't have these notes now sorry

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Cyclotron

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Yeh rtu syllabus k hisab se h ky sir??

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Abhi to maine focus AKTU ko kiya hai,

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Toh sir ise rtu student dekhe h toh cover ho jayga ky yeh ch ...sirf yhi revision video ko

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@@agratagupta8712 i think i have covered standard syllabus so ho jana chahiye

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Iski ek hi video h ky ??

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Ek video me revision kiya hai

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@nita

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🤚

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Anyone from IIT???

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🙂🙂

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3:36

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👍

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Sir iss lesson ke notes dijiye na plz.. on the pdf format...

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Join the google classroom link community tab me comment me hai link

[@llfastalll4003]

Before exam

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When you exams will start

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30, 31 may, unit test 1, 1st year

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Sem exam is in july.

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@@llfastalll4003 which university

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Kon kon lpu se hai endterm ki preparation kar raha hai 😂😂

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Mera bhai lpu me hain o ye video padha tha to mujhe bataya Mera second semester me physics hain hm bhopal se BTech kar rahe hain