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.
This is what I was looking for since 1 year, thank you for sharing your knowledge
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
In case of gamma rays, energy of photon is greater than the band gap energy. Then why it is not getting absorbed..?
Good Noon. Clear fundamental and thought full information. Thank you
Nice lecture on Optical absorption of material!!
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?
What equipment used to observe electron movement?
Thank you for the distinction between metals, insulators and semiconductors.
Clearly explained energy levels and band gaps. Thank you
Nice information on optical properties of materials. Thank you sir
Nice explanation of band gap of metal insulator and semiconductor
Explanation of band gap is informative thank you
Good explanation about Optical Absorption in Materials.
Great video! What about optically opaque (small band gap) electrical insulators (large band gap)? How can they be both at the same time?
What for the insulators which are opaque
Nice Video on Optical Absorption in Materials
Wonderful informative lecture.
Thanks for your wonderful presentation.
Well explained in simple manner
excellent information.nicely explained. Thank you
Nicely explain the different optical properties
Thank you for the clear thoughts
Intresting presentation.
Very informative video, thank you so much sir
Very Informative video.
Very informative presentation
Nicely explained. Thank you.
Thanks for informative lecture.
Thanks for your informative talks.
Thank you, this was very clearly explained
Great understanding sir
very useful information.........thank you
Thank you sir, nice presentation
Well explained sir....thanks
Informative session
informative and well explained
Knowledgeable session
Nice presentation
Informative video...
Very informative lecture
nice presentation
Thanks sir for explanation.
Very informative talk.
Very informative sir thank you
Thank you nice presentation
hey, he's using callister as well. nice
Good one. Thanks
Thanks a Lot sir..............#makemescientific
Very nice video
Very informative
Thank you
Good one.
very useful for students
good teaching thanks dr s r choubey
Thanks a Lot sir.
Thank you sir
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
Nicely explained. Thank you.
Informative lecture
Thank you