Raman Basics

[@RoamingNJ]

Dr. Bradley is a fantastic presenter. I came online to get an answer to one question, and then I found myself watching the entire Raman / FTIR video catalog FOR FUN. Fantastic video series!

[@muffy666666]

Finally someone explained the anti-Stokes in a clear fashion. Thank you!

[@Qurann21]

this thermofisher man is an absolute legend

[@amayanapyeer]

Thank you ^^ After reading few books and watching few videos I finally understand Raman only thanks to this video

[@faizan4929]

Prof. You really explain very well. Infact, you remind me of my Prof. of Radiation Physics and dosimetry.

[@cadepope4093]

So stoked about watching this!!!

[@rustyjeanz]

Sir you are best. I learned from you. Stay Blessed

[@thinkofparis]

Fantastic video. Good teacher as well.

[@gavares3]

You sir, are an awesome dude. Thank you for these videos.

[@timwatson5124]

The Boltzman distribution describes the probability of occupation of energy states, but it is the lower probability of occupation of higher energy states that makes AS lines 'less useful'.

[@sheagallagher95ify]

Brilliant Explanation thank you!

[@Spencer-vm9kt]

Thank you, you're a saviour!

[@mimitsalavouti1314]

Thank you very much for this video, excellent explanation.

[@alexis5057]

I love this man ! Merciiiii

[@somayeh2022]

Thank you for this clear explanation!

[@نور-ع4ظ3خ]

نفس البحث اللي بشرحه 🥺🥺🥺يارب توفيقك

[@zethayn]

Thank you so much!

[@mehdi9431]

Thanks a lot. Simple but so effective

[@vipulsharma532]

For anti-stokes line, how energy is conserved? As excited electron emit more energy then it absorbs from photon.

[@olamarca7171]

I think the molecule adds some Energy from itself thus the energy is higher that laser's energy. But then what happens to the molecule?

[@vipulsharma532]

@@olamarca7171 I figured out the reason. The energy absorbed from Stokes line, that same amount of additional energy is emitted to Anti Stokes line. Hence the energy is conserved.

[@danieleronchetti1314]

@@vipulsharma532although this process can happen that's not current. The answer is simpler. For simplicity just imagine the molecule as a spring vibrating. When antistokes photons are emitted the extra energy is given by the molecule itself, which later will vibrate with less energy (less frequency). The opposite happens for stokes lines

[@mahatmagandhi3774]

Exactly as Daniele says, consider the system correctly for energy conservation. Laser and electron both carry energy to begin with.

[@arjunbarwal1502]

Imagine molecular vibration as a drum vibrating. And Laser light photon as a ball... If drum is already vibrating and gives its momentum( energy) to the incoming photon ( ball), then drum will loose some energy but photon will gain that energy. That is anti stokes scattering. Molecules give their energy to the incoming photons. So molecules lose energy but the scattered laser photon gains.

[@peilingsun3270]

very clear!

[@rinema4715]

great explanation ! Thank you

[@olamarca7171]

So spectrometer detects Stokes photons, but we are looking for energy of molecule (V0->1) and how is this achieved?

[@Jenhla]

The energy (frequency) of the incident laser is known. You can subtract the stokes from the laser to obtain v0->1.

[@JoaoBarbosa1996]

Great Video!!

[@padmak1657]

Thank you sir👍

[@pedramahariri]

Ammmazing!

[@mahmuldulhasan6359]

Thank you sir.

[@fractalnomics]

5:17

[@lasokheng737]

a good explanation one :D:D Thank

[@MolecularSpectroscopy]

Visit thermofisher.com/learnraman for more information.

[@ilyasjehbali8767]

thank you sir

[@gxassassino]

thanks

[@pablovignolo637]

Te quiero mucho

[@ouzytheoriginal]

great video, can u hire me for a job :D

[@billdole9766]

Nu Gundam!

[@ramanargoshy7183]

Why is this called raman?

[@matthiascarroll1924]

Raman Argoshy C.V. Raman, he won the 1930 Nobel Prize in either chemistry or physics. Basically he predicted it based on his interest in light and sound wave kinetics.

[@arjunbarwal1502]

Because the phenomenon was observed by Sir CV Raman. It was named after him

[@thedon207]

This is wher the Indian scholar explained by western

[@jacobvandijk6525]

If you can't explain what the virtual state is, I can't understand the concept. Bye.

[@alyaksandrapetrakouskaya2417]

Thank you very much! Great explanation!