@@somnathkarmakar5820 May be you are correct, but if we consider spring model then a time is required to compress the spring and to release it to start the vibration.
The concept of spring is idealized.The actual bonding in atoms are chemical bonding formed due to exchange of electrons or sharing of electrons,so to vibrate atoms sufficient amount of energy is needed and it can happen in zero seconds or very small amount of time scale like 10^-8 second.I hope you can understand sir...am I...?
In behalf of all Engineering student around the world, I'd like to thank all indians for provinding such good material online.
hahaha being an indian, I'm greatful for these lectures too, definitely a savior✌🏻
your country bro ?
Well done, and wonderful simplicity. Specially appreciate the time devoted to the history of the science. Inspirational teaching.
i like your speech and explanations,examples
It is worth . Thank you
Thank you for the subtitles!
Thank God there is 2x potion here. Good lecturer though :D
Sorry, but I didn't understand it very well, expected more elaborated explanation by IIT Prof .
nice sir
can u tell me that how can we distinguish bulk and nano crysatalline material using x ray diffraction technique
nice
Where are the other lectures?
Excellent 👌 good job..
When a ray is falling on an atom it is exited, my question is what is time required to start the vibration!
Zero time is required.
@@somnathkarmakar5820 May be you are correct, but if we consider spring model then a time is required to compress the spring and to release it to start the vibration.
Sir I don't know what is your degree in physics but I think you must be MSc in physics
The concept of spring is idealized.The actual bonding in atoms are chemical bonding formed due to exchange of electrons or sharing of electrons,so to vibrate atoms sufficient amount of energy is needed and it can happen in zero seconds or very small amount of time scale like 10^-8 second.I hope you can understand sir...am I...?
@@somnathkarmakar5820 Thanks! May be you are correct!
i need more explanation about closed packed hexagonal structure sir. but its ok, explanation overall is okay
20:04
Thanks sir... Good explaination
Sir I have a question could you please help me to solve?
What is lattice parameters of material
all correct, ok
Thank you sir
h,k,l what ?
Miller indices I guess
👍👍👍👍👍👍
Everything ok
ok
very helpful thanks alot
great effort
Sorry to say but not at all interactieve .
Boring
kuch bhi samaj ni aaya😢
Sahi smjhaya h
Improve your lecture
I can't belive,this is the iit roorkee lacture 😡😡,most irritating lacture i have ever seen.
Exactly
lacture? You know, the nice thing in youtube is, you can actually NOT watch a video and just skip it. Amazing right?
@Aakash 2K19 ME 001 haahah... Kya joke mare ree... Hasi nhi rukk rhi meri 😏