usually when I see educational videos on youtube made by my fellow countrymen, I feel frustrated as most of such videos focus on explaining the phenomenon in question in a very crude incomplete manner and targeted on cracking some entrance exam. THIS IS ONE OF THE VERY FEW GOOD VIDEOS MADE BY INDIANS, which tries to EXPLAIN STUFF PURELY FOR UNDERSTANDING AND DONE COMPLETELY with a good presentation
Dude, I loved your explanation. You realize that there are not many people in this world who have made this information clearly accessible on RUclips right? So you have done a good service.
Usually such kind of practical explanation is given by foreign especially teachers from western countries. But this particular video by my a person my country is really awesome and outstanding.
That was a very clear, thorough explanation! The pace was really great to follow along with and this helped me understand this way better! Thank you for the great video!
It is sometimes tricky to rely on educational videos on YT, but this one was really great! Perfect speed for maintaining both my concentration and my understanding high :) Thank you.
Can you please tell me the software you used to create this video ? .. it's a great explanation...I was studying stumbled upon this video,liked the way of representing.
Hellow sir, thanks for your video, I just want to know, at 3:54, what do you mean by "y does not affect anything that is happening on this plane", so when sin is over 1, you said it is a real number. How do I comprehend that sin could be greater than 1, and it is still a real number. Thank you again.
At 5:22 what happens to the negative square root? I appreciate it would give exponential increase but wonder if there is any other justification to exclude this additional solution.
Wow a fantastic explanation! A couple of questions: 1) When light hits a metal, there's a certain "skin depth" associated with the metal -- how far the light can travel inside the metal before it attenuates by a certain amount. Do evanescent waves have something to do with this? 2) In general, is any attenuation of waves attributed to evanescent waves? I.e. any time there's attenuation happening, is there an associated evanescent wave?
Cool. What is the phase of the couple evanescent wave after it is coupled into the medium that is brought close to it compared to the incident and reflected fields in the TIR medium?
Thank you so much! This is such a clear and informative video. It leads you right to the answer! I love it! My only question is if light waves are generated from the evanescent wave when it goes into a medium of the original refractive index, how can it be total internal reflection? Some energy must be lost t the evenescent wave, correct?
Question...if the right side refractive index is greater than the left side will the evanescent wave even form? And, if so, will it still flow in the right side medium with some of the refracted or transmitted wave or be inverted back into the left side with the primary incident wave and flow as a real evanescent wave within the envelope of the primary?
Sine the assumption of sin(theta_t) >1 doesn’t hold true, how can we justify this approach? I am having trouble wrapping my head around this idea…. Can someone help me?
The impossibility of satisfying the boundary conditions (BC) is not satisfactory as an explanation of the evanescent waves. How/Why are these waves created? The wave itself does not know about boundary conditions, these are just mathematical tools to describe the whole situation. What exactly happens when a wave that cannot satisfy the BC hits the wall? Neither the wall nor the wave do know about the BC, what is the microscopic cause of the exponential damping occuring?
![ChatGPT is made from 100 million of these [The Perceptron]](/img/1.gif)
usually when I see educational videos on youtube made by my fellow countrymen, I feel frustrated as most of such videos focus on explaining the phenomenon in question in a very crude incomplete manner and targeted on cracking some entrance exam. THIS IS ONE OF THE VERY FEW GOOD VIDEOS MADE BY INDIANS, which tries to EXPLAIN STUFF PURELY FOR UNDERSTANDING AND DONE COMPLETELY with a good presentation
Dude, I loved your explanation. You realize that there are not many people in this world who have made this information clearly accessible on RUclips right? So you have done a good service.
Hands down the BEST video on evanescent waves. Just leaving this so other people watch as well. Well done and thank you!
Great explanation ! You saved tons of time in my acoustics assigment
Thank you Dhananjay Varma for uploading this video. The best explanation ever!
Never seen such a good video explaining this topic.
Usually such kind of practical explanation is given by foreign especially teachers from western countries. But this particular video by my a person my country is really awesome and outstanding.
That was a very clear, thorough explanation! The pace was really great to follow along with and this helped me understand this way better! Thank you for the great video!
bro U are really great on explanation!!! thank U for being my saviour to do my final project
Great video with a simple explanation of this topic. Thank you very much!
It is sometimes tricky to rely on educational videos on YT, but this one was really great! Perfect speed for maintaining both my concentration and my understanding high :) Thank you.
Best explanation so far....
you killed this explanation man
Can you please tell me the software you used to create this video ? .. it's a great explanation...I was studying stumbled upon this video,liked the way of representing.
Thank you, very clear explanation.
Hellow sir, thanks for your video, I just want to know, at 3:54, what do you mean by "y does not affect anything that is happening on this plane", so when sin is over 1, you said it is a real number. How do I comprehend that sin could be greater than 1, and it is still a real number. Thank you again.
Your voice is really good and professional.
Great work.....read a lot but only here found simple & effective explanation.....(y)
Very- very good explanation
Is it connected to Quantum tunalling of particle through potential wall ???
Though great explanation 👌
At 5:22 what happens to the negative square root? I appreciate it would give exponential increase but wonder if there is any other justification to exclude this additional solution.
The E-field will blow up towards +z. Which is not physical.
How's sin(thetaT) a real number when cos(thetaT) is not?
very well explained, thank you!
Wonderful Explanation. Thanks a lot.
Wow a fantastic explanation! A couple of questions:
1) When light hits a metal, there's a certain "skin depth" associated with the metal -- how far the light can travel inside the metal before it attenuates by a certain amount. Do evanescent waves have something to do with this?
2) In general, is any attenuation of waves attributed to evanescent waves? I.e. any time there's attenuation happening, is there an associated evanescent wave?
thank you for the explanation
Nice one and
very helpful
Cool. What is the phase of the couple evanescent wave after it is coupled into the medium that is brought close to it compared to the incident and reflected fields in the TIR medium?
From where you got the equation for transmitted wave initially.
Thank you so much! This is such a clear and informative video. It leads you right to the answer! I love it! My only question is if light waves are generated from the evanescent wave when it goes into a medium of the original refractive index, how can it be total internal reflection? Some energy must be lost t the evenescent wave, correct?
very good explanation...
Super helpful! Thanks :)
Thank you!!
Very well explained.
Excellent explanation!!
is it possible that sinus can be higher than 1??
Thanks a lot !
Question...if the right side refractive index is greater than the left side will the evanescent wave even form? And, if so, will it still flow in the right side medium with some of the refracted or transmitted wave or be inverted back into the left side with the primary incident wave and flow as a real evanescent wave within the envelope of the primary?
Great explanation
Thank you so much sir....It's really helpful..Can you please explain suppression of the surface wave in TE and TM mode
Superbly explained! Can you suggest a reference book that you followed?
Sine the assumption of sin(theta_t) >1 doesn’t hold true, how can we justify this approach? I am having trouble wrapping my head around this idea…. Can someone help me?
great explanation!
Great video
Thank you so much! :)
Thanks for the help
Nice 👍🏻🙂
Nice presentation thanks
Thanks a lot :)
@@dhananjayvarma7620 hello sir greeting of the day..actully i am working on same topic so can we chat on mail ..??? plese send me yor mail id.
Interesting!!
THANKS!
Thanks
nice
The impossibility of satisfying the boundary conditions (BC) is not satisfactory as an explanation of the evanescent waves. How/Why are these waves created? The wave itself does not know about boundary conditions, these are just mathematical tools to describe the whole situation. What exactly happens when a wave that cannot satisfy the BC hits the wall? Neither the wall nor the wave do know about the BC, what is the microscopic cause of the exponential damping occuring?
I don't think you're defining your terms completely.
Thanks