What happens to photons the do not get absobed? How will they transit the (crystaline) structure of atoms in between entering and exiting the transparent material or will they act like waves and have some form of interference. And how about foton exited electrons falling back to the lowest energy levels while emitting photons in a metal, is that what we see as reflective or is reflection the same photon hitting the surface bouncing back - and how?
Thank you for the information provided. It is very useful. Dr. D. Silambarasan, Assistant Professor of Physics, The Madurai Diraviyam Thayumanavar Hindu College, Tirunelveli-627010, Tamilnadu.
Types of materials and their absorption of light and excited energy levels are explained well.
Thank you.
Good Noon. Clear fundamental and thought full information. Thank you
Nice lecture on Optical absorption of material!!
This is what I was looking for since 1 year, thank you for sharing your knowledge
Clearly explained energy levels and band gaps. Thank you
Explanation of band gap is informative thank you
Nice information on optical properties of materials. Thank you sir
Nice explanation of band gap of metal insulator and semiconductor
Thank you for the distinction between metals, insulators and semiconductors.
Wonderful informative lecture.
Good explanation about Optical Absorption in Materials.
Well explained in simple manner
Nice Video on Optical Absorption in Materials
Thank you, this was explained in a very clear manner and easily understood. Looking forward to watching more of these.
I giggled a little because you used the word CLEAR to describe it...I totally agree, and I’m sure no pun intended
Intresting presentation.
Great video! What about optically opaque (small band gap) electrical insulators (large band gap)? How can they be both at the same time?
Thanks for your wonderful presentation.
In case of gamma rays, energy of photon is greater than the band gap energy. Then why it is not getting absorbed..?
Thank you for the clear thoughts
Very informative presentation
Very Informative video.
excellent information.nicely explained. Thank you
Nicely explain the different optical properties
Very informative video, thank you so much sir
Great understanding sir
Nicely explained. Thank you.
What happens to photons the do not get absobed? How will they transit the (crystaline) structure of atoms in between entering and exiting the transparent material or will they act like waves and have some form of interference. And how about foton exited electrons falling back to the lowest energy levels while emitting photons in a metal, is that what we see as reflective or is reflection the same photon hitting the surface bouncing back - and how?
Informative session
Thanks for informative lecture.
Thanks for your informative talks.
Thank you sir, nice presentation
very useful information.........thank you
Knowledgeable session
informative and well explained
Nice presentation
Informative video...
Well explained sir....thanks
Very informative lecture
Very informative talk.
nice presentation
Thank you, this was very clearly explained
What equipment used to observe electron movement?
Thanks sir for explanation.
Thank you nice presentation
Very informative sir thank you
Good one. Thanks
Very nice video
Very informative
Thanks a Lot sir..............#makemescientific
very useful for students
Good one.
Thank you
Thanks a Lot sir.
good teaching thanks dr s r choubey
hey, he's using callister as well. nice
Thank you sir
What for the insulators which are opaque
Thank u
More informative talk
Thank you for the information provided. It is very useful. Dr. D. Silambarasan, Assistant Professor of Physics, The Madurai Diraviyam Thayumanavar Hindu College, Tirunelveli-627010, Tamilnadu.
thanks thanks thanks keep on you are a good Doctor
Informative lecture
Nicely explained. Thank you.
Thank you