Basics and principle of Raman Spectroscopy | Learn under 5 min | Stokes and Anti-Stokes | AI 09

Analytical Instrumentation - Raman Spectroscopy
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One may have heard about Raman effect quite a lot of times. In this video we are going to discuss the concept of Raman scattering first. But we also need to understand Rayleigh scattering first. Once the phenomenon of Raman scattering is explained, this video will discuss why and how the Raman effect takes place and how Raman scattering is generated. The viewer will also learn about the stokes lines and anti-stokes lines and how Raman scattering is a two photon process. Finally, the use of Raman effect in spectroscopy is discussed. This will help to perform qualitative and quantitative analysis on the sample under test.
The Raman scattering takes place due to inelastic collision between photons and electrons. The difference in energy between incident photon and emitted photon generates Raman lines. Depending on the emitted frequency, the lines generated are called as Stokes lines if their frequency is less than incident frequency of photons, if the frequency of emitted photons is greater than incident frequency, it is called as Anti-stokes lines. From the Raman spectra, one can determine the molecule in the sample by studying the stokes and anti-stokes lines. Similarly, from their intensity one can calculate the concentration of a particular sample.
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[@PracticalNinjas]

Get amazing content and support on Academic Courses, GATE Courses, Professional Courses and Career with Ekeeda. Go to ekeeda.com/ platform and register with the referral code EAPHAR74. Use the coupon code Ninja10 on purchase for special discount!
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[@giancarlomirandacastro213]

Hi! could you tell me which program did you use to make the draws? Many thanks in advance and sorry to bluntly ask you that.

[@zey2012]

This is so much simpler and easier to understand than the 8-page instruction from my class. Thanks a ton!

[@eliobatista3399]

Word

[@sushmitagautam5397]

I can't imagine anyone else teaching in such a Simplified Way...👌 Thanks 🙏🙏🙏 sir

[@bhattvd1]

You are a good teacher! First time a lay man like me can understand Raman Spectrometry! Thanks.

[@Niet177]

So simple and didactic, just brilliant.

[@griffitheternity4908]

Thanks - using RAMAN for my PHD and this was a great overview

[@video7639]

me too :)

[@OlumideOni]

Nothing more than "Thank you". This is a very simple straight-to-the-point explanantion

[@PracticalNinjas]

Thanks Olumide Oni :) We are glad you liked the video.

[@SubrahmanyamDevarakonda]

its not about electrons. The molecules have different vibrational levels. Raman scattering doesnt have enough energy to make electronic configuration shift. It just changes vibrational state of molecule. I guess.

[@InfinityUnknown201]

Thank you so much for your sharp teaching. It's really help a lot to me. Thank you again

[@lisanation2203]

im stressing out of my head doing my last minute chemistry and this comic sans honestly calmed me down so much

[@PracticalNinjas]

Glad we could help :)

[@amiyarmahapatra8367]

Thnq for this short video. plz keep uploading such videos, this saves time and is more useful than going through the texts.

[@PracticalNinjas]

Thanks Amiya R Mahapatra :) We will surely keep uploading such videos

[@micelamicela]

Thank you very much! Greetings from Serbia.

[@aqeelshahul9176]

thanks for making such a clear and concise video!

[@MrDiego8536]

Great explanation. Very helpful, thanks!

[@PrabhavShukla1]

This was so beautifully explained!
I learnt all this in my 1st year of Engineering and forgot about it since it was not used in my work. I had to know the basics again today and other videos I went through left me even more confused, until I stumbled upon yours. Saved me a ton of time I'd have spent going back to reference books.
Thanks a lot man! Musch appreciated

[@PracticalNinjas]

Glad we could help you Prabhav Shukla. Thanks a lot for your positive comments. Such feedback from our viewers motivates us to create and publish such more videos :)

[@RGSClassesEssential]

at 2:50 you are saying the vibration level of 'electron' I think the whole discussion should be understood in terms of the vibrational or rotational state of the 'molecule'. please correct me if I am wrong.

[@qienng8376]

Wonderful video! Thank you for your explanation

[@pallabisarma5200]

this vdo is truely helpful ...thank you

[@sreevidyasuresh7038]

Thank you so much for explaining it very simply 💞

[@coldram1111]

We use this exact principle to check the etch rate on wafers.

[@charumalik6728]

nice video. Your explanation was quite thorough.

[@PracticalNinjas]

Thanks Charu Malik for such positive words. Glad you liked the video.

[@pandidpt2000]

Enna ga

[@syredeathtrooper]

Fantastic video. So concise and so clear. Explained better than most PhD professors could!

[@smrutiranjanmohapatra5487]

Man you explained so well than my Copycat Book and My teacher hats off to you 😊

[@sparshagarwal6111]

best video. Thank you for explaining it so well.

[@PracticalNinjas]

Thank you Sparsh Agarwal :)

[@olamarca7171]

I have just watched other film about Raman scattering and the guy said that the energy is not absorbed in Raman and electrons are NOT excited in Raman and this is the difference between Raman and fluorescence. So?

[@simphiwedhlamini5399]

Great video thanks

[@manideepak2605]

crystal clear explaination....thankyou

[@pauloh9974]

very nice explanation

[@eric831017win]

Thanks from Taiwan

[@akhileshtiwari7099]

Thanks 😊 sir
Your explanation was best 👍👍

[@shaggar]

Thank you so much. Such a great explanation.

[@PracticalNinjas]

We are glad you liked the video :)

[@fractalnomics]

Fantastic, thank you. I am about to present on my channel how Raman spectroscopy will have us reinterpret the greenhouse atmosphere and this is useful background for me and others I hope. Raman spec. identifies N2 and O2's spectra, and their temperatures, and concentrations 4:13, and as a result I claim they too are greenhouse gases.

[@PracticalNinjas]

Sounds interesting Blair Macdonald. Instead of just understanding about the raman spectroscopy, it will be interesting for viewers to see how it can be applied and used for analysis. Thanks a lot for your comments and we are glad we could help. We will surely check your video once you publish it :)

[@RyukoChan87]

Wow this was so useful!
Thank you very much! :D

[@anthonydefilippo8106]

Excellent videos Practical Ninjas!

[@Dytto33]

Can u please explain using example how concentration of sample can find

[@joyceyang1732]

Nice explannation!

[@bishalsarkar73]

Nice explanation

[@fitwithPrajwal]

Amazing explanation 👏

[@PracticalNinjas]

Glad you liked it

[@zethayn]

Thank you a lot!

[@rishikamaji7709]

Great video... Peace out buddy

[@ranitroy7994]

I have a comment: Why would you state that a photon is absorbed in case of Rayleigh Scattering? Rayleigh Scattering undoubtedly has dependency on the complex permittivity of a material but primarily it is change in the angle of photons due to Light Matter Interaction. If there was any absorption involved Rayleigh scattering wouldn't have lambda^4 power dependency. The Quantum Mechanical description of Rayleigh Scattering can be used to describe the transition between ground states and virtual states, but that is for the Hamiltonian of the Entire system and not just a single charge.

[@barniechong1183]

dope. thanks fam

[@j.d.burton5097]

The inelastic process in Raman is a change in vibrational and/or rotational energy state of whole molecules. What is explained here sounds more like electronic excitations, like in florescence.

[@kaviyav4454]

Thankyou very much

very good explanation, well done.
god bless my exam for tomorrow

[@PracticalNinjas]

Thanks. All the best for your exam. Hope you do well :)

[@rubayettanveer3479]

Great work. Thanks a ton.

[@adityagangwar_19]

Sir kisi kisi book me likha hota h ki scattering is not absorption it is reflection

[@akshatrastogi9063]

Very nice!

[@rishavharsh7014]

Your video is short, concise and misleading. Yes, you can explain the concept of stokes and anti-stokes with respect to electronic energy levels. But in raman spectroscopy, it is performed usually to observe the lattice vibrations in a sample. You missed out the part where you had to correlate the vibrational energy levels with phonon excitation which is the core of raman effect. Most people would keep your electronic excitation viewpoint if they dont look for more elaborate explanations. I do appreciate your video and we need more of it but it should be complete. All the very best for future works.

[@PracticalNinjas]

Thank you! Our backgrounds are not in pure sciences and we are interested in explaining the basics for better and easier understanding of the concepts.
Appreciate your inputs, we will try to improve in the future ones.

[@tdhanasekaran3536]

This explanation is good for Physical Chemistry students who are just beginning. The Raman effects are much more involved and an ocean by itself in science. For example to understand Raman effects in Solid state physics (crystalline amorphous and something in between) requires a deep knowledge in physics including Quantum mechanics and modelling of the Raman Spectra in complex situations to make sense of the experimentally observed Spectra.

[@dalalalhilfi87]

Thank u What are the calculations that we can calculate from the Raman?

[@nayarajeiely6826]

Very heplful

[@mouniaelyousfi9740]

very helpful, thanks

[@lukasroederer6108]

wow such a good and simple video

[@linaamer2857]

Suddenly I like instrumental analysis, thanks bro 👍⚘

[@vishalivish7164]

Perfect explanation given ... thank u 🤗

[@PracticalNinjas]

We are glad to help

[@ellora5535]

Thañks it was really helpful.😊😊

[@industrialautomationknowle373]

Nice Video

[@beautyofscience7612]

New subscriber 👍♥

[@thelightofknowledge9725]

Excellent

[@soniyaravi7492]

can u explain to me about photons molecule interactions that gives rise to infrared and Raman

[@charme2377]

i have 3 questions please : 1) what is fermi level 2) what is density of states 3) what is transition interband

[@PracticalNinjas]

Explaining these concepts would be a bit difficult over here. But you would find a lot of material available online. We would share the links here if we find them :)

[@charme2377]

yes i tried i didnt find any video :(

[@PracticalNinjas]

We will check and if we find any we will post the url here.

[@anusha2410]

Please do the video regarding all types of spectroscopy

[@PracticalNinjas]

Sure, we will be uploading new videos soon..

[@riyagopal3620]

👍👍👍 thank u sir

[@Expedition_Entrada]

Raman spectroscopy explanation 0:51 sec

[@shirinmittal3225]

Thankyou
helped a lot

[@camilarocha6465]

Straightforward and easy to understand. Thank you!

[@karanveer470]

So how would u differentiate btw scattering and (absortion & emission) ??
Here According to you both are same?

[@samiramammadova4942]

Thank you very much for such good explanation . Great

[@PracticalNinjas]

Glad you liked our video Samira Mammadova.

[@subramanii79]

Raman effect is due to pure or impure gas.tell answer and reason

[@juhaeranjum1417]

peace out to you too, kind stranger!

[@michaelqiu9722]

You should really not say things like "electrons vibrate" or "vibrational level of electron" (instead of energy level) because that's super confusing. Electronic structure is its own separate thing, different from (molecular) vibration.

[@vithabi4080]

I type raman for the food got is 💀💀💀💀

[@joshfallentine4607]

Thank you for making this

[@sagarsameer6442]

it was really good you should cover more of such topics especially of laser and spectroscopy.

[@Sarah-hc6kj]

Thank you

[@suryanshvaibhav]

Now it is clear why and how raman effect it is ??
Thank You ❣️

[@arshiakhan6959]

please give some examples of raman data

[@jivvala824]

Excellent video on the subject line with a very clear explanation and interesting schematics. Thank you and Keep doing such kind of useful tutorials.

[@ammarbarbhaiwala9908]

I have been studying this topic in physics and I could understand it but you made it so simpler

[@PracticalNinjas]

We are glad you liked the explanation :)

[@hanaa5365]

Could you please share your material if you still have it?

[@foot2road374]

Very simple to understand

[@williamross5308]

I wish I could up-vote more than once. Great video, thank you.

[@PracticalNinjas]

Thanks for your support :)

[@dhanshaviswam1117]

Super

[@omsingharjit]

3:00 when you are saying different frequency of emitted photons , so is it possible that , its frequency could be higher then incoming light ?
Similar to non linear optic
?

[@danieleronchetti1314]

Exactly. However the extra/less energy is due to a change in vibrational state of the molecule

[@krishnasajeevan5802]

Thanku soooo much sir

[@cholokX]

Thanks for sharing

[@firatbulak]

You are the man! Thank you for this perfect video!

[@shaiksubhani7704]

Nice Video Thakes

[@crickbuzz31]

In india majority eye is fill of those cs package
Thats why india is behind
To develop a country it need core to be developed
Electronics mechanical physics should be Prioritize .

[@zainabjawad122]

It is amazing video 👍👍🙏

[@lisaonthemargins]

Wow great video Ethan keep it up

[@AA-fi1yu]

Thank you for explanation. But I have just two similar questions. Does the electron possesses different vibrational levels, or molecule? Does radiation impacts on molecule or electron?

[@noahhovde3888]

Isn't 1% probability of the occurrence of the Raman effect on the higher end of the spectrum?

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[@pujaranimohanty7415]

Explanation is good n clear but I am thinking I would be more better than this video 🤗..... Don't mind...this is my opinion... clarification means all details is the most imp

[@saktichakrabarti1336]

Hello, I like your graphics. You can enhance the quality by talking slow and pronouncing key words clearly and discretely.

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thanks for sharing such vedio

[@Smoothcurveup52]

Thank you so much sir 🙏 best explaination

[@ramisamuelson6941]

wow dude your video saved me, thank you very much!!!!

[@PracticalNinjas]

We are glad we could help SoloTape

[@shortclips482]

@Which is more weaker strokes lines or antistrokes lines?

[@janetanderson422]

I find it very hard to understand your accent. I'm sorry I couldn't understand what you were saying...