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You are great sir, I understand this lecture so easily. Basically sir your lecture was very good and meaningful. The main thing is, i understood your lecture very easily. Once again you are great sir....
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why you had taken phie = phie c in derivation of acceptance angle , because for TIR to be happen Phie must be greater than the critical angle ,not that much large but it need to be greater. And Nice lecture.
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in this video as the signal is going from air medium to some medium i.e.core as it moves from rarer to denser but according to snell's law when light is going from rarer to denser it bend towards normal but how did it go away from normal. please clear my doubt @engineeringfunda
@@EngineeringFunda my point is Air is a rarer medium in between core of glass or plastic. But in diagram as you explain when light goes from rarer to denser it bend towards normal but in diagram you show that it moves away from normal. Thats what i don't understand. Please explain that.
Yes, as light passes from a less dense to denser medium, the light bends towards the normal. This is shown in the purple and orange rays in the video; if you were to draw a line following the incident ray down inside the core, you will find that they bend towards the normal. Maybe you may have the misunderstanding that "the bigger the incident angle, the smaller the refraction angle". This is not true, you may give arbitrary values of n1 and n2 and calculate the refraction angle using snells law. Hope this helps :).
@16:20, Why in index difference (delta)N=n1-n2 but in relative refractive index (delta)N1=n1-n2 and so N1 is coming out of underroot? So messed up....just hate this subject, hate this branch, hate you, hate my life.
Relative refractive index are calculated with respect to separate medium, and N1 is coming out of underfoot because if you multiply these to term (2n1)(delta n1) then you will find n1^2 and root cancels square so you get n1 only.
Index difference is nothing but the difference between refractive indices of the two medium under consideration and is denoted by (delta n = n1 - n2). Relative refractive index is something different. It is as an index of one medium in relation to the other medium, denoted by (delta = (n1 - n2)/n1). Note very carefully here in the first case "delta n" is a single variable means delta and n are not separate for algebraic calculation, they are treated as just one variable. In second case delta is a separate variable and n1 and n2 are also separate variables, so here we have three separate variables, so (delta n1 here actually is delta * n1) that it is the multiplication of two algebraic variables, hence it is coming out of the square root. Hope you understood !
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I have one question that in your previous videos you consider n2 as core and in this you consider n1 as core does this make any difference or same . For ofc n2>n1 , is this applicable for same.
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Sir, when light travel from rarer to denser after refraction light bend towards normal, but in this case light travel from air to core medium light bend away from normal, how sir
1. A light wave is travelling in a semiconductor medium (GaAs) of refractive index 3.6.It is incident on a different semiconductor medium (AlGaAs) of refractive index 3.4 & angle of incidence is 80○. Calculate numerical aperture & acceptance angle. Will it result in total internal reflection? could you please tell me this question for answer sir
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Sir, thanks a lot. Can you please answer my query? What if (N1)² - (N2)² is greater than 0? As values of N1 and N2 can be controlled by us, this can take place. If this happens, then the value of sin theta will exceed 1, which is not possible. So, can you please explain this restriction.
It's not n1 square minus n2 square. It has got root over it. So its value is never going to be more than 1. Moreover n1 will always be greater than n2 otherwise TIR will not take place.
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For all the classes before you took n2 as refractive index of core but in this lecture you consider?n1 for core?? Isn’t that too confusing and controversial???
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*You should give atleast reply on doubt comments... One dislike, just coj of that attitude. If you reply, I'll change dislike to like* 😤😤😤😒 What is the difference between Relative Refractive Index & Index Variation ??? At 15:18 , how you considered n1~ n2. If it's approx equal, then N.A. should be zero, coj (n1 -n2)= 0 Please reply me and others who have Doubt
@@EngineeringFunda ... I've noted. We know, n1>> n2, then how, n1 approx equal to n2. If we put in (n1-n2) , whole N.A. will be zero. Also, @17:02 ...how that n1 came out of the root??
@@Pranjal90 arrey bhai, n1-n2 is not zero because that is delta(very very small value like 0.000001 which is equivalent to zero). Also, answer to your next ques.:- it is NA=sqrt root(delta×n1×2×n1)= (n1) sqrt root(2×delta) . Hope it helps!
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Excellent level of teaching....easily understood ....this topic.....🥰...Tqsm for this video...sir really helpful....👌👌👌
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Hi
Bhot achhe se explain kiya hai .Mai college wali ppt chhod ke apki video se sikhaa.Very good and thank you.As a gift I am subscribing !!!
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You are great sir, I understand this lecture so easily. Basically sir your lecture was very good and meaningful. The main thing is, i understood your lecture very easily. Once again you are great sir....
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You are awesome 😎 I understood it in first time
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Sir thank you very much for a easy understanding lecture. I got it crystal clear. Thanks for the support via your video
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@@EngineeringFunda for Sure sir Our support is with you.
thanks a lot sir.Really understood the concept.Excellent teaching skill.Love from nepal
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very helpful class sir, love from Bangladesh.
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what a lovely explaination sir what a teaching sir excellent
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Tomorrow is physics paper??
Thank you so much, your teaching style is really relaxing, really enjoyed this video
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thanks sir every concept is now crystal clear.
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Super sir we can easily understand this complex derivations❤
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Good strategy of explanation sir.
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Well explanation thank you sir❤
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At 11:38 how can we replace sin fir by sin fic value...??
Very nicely explained 👏
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@@EngineeringFunda sure sir..!
amazing explanation😇
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why you had taken phie = phie c in derivation of acceptance angle , because for TIR to be happen Phie must be greater than the critical angle ,not that much large but it need to be greater. And Nice lecture.
Thank you so much sir🥰
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We need teachers like you sir🥰keep teaching sir😇
in this video as the signal is going from air medium to some medium i.e.core as it moves from rarer to denser but according to snell's law when light is going from rarer to denser it bend towards normal but how did it go away from normal.
please clear my doubt @engineeringfunda
Angle of refraction does it. As per snels law.
@@EngineeringFunda my point is
Air is a rarer medium in between core of glass or plastic. But in diagram as you explain when light goes from rarer to denser it bend towards normal but in diagram you show that it moves away from normal.
Thats what i don't understand.
Please explain that.
Yes, as light passes from a less dense to denser medium, the light bends towards the normal. This is shown in the purple and orange rays in the video; if you were to draw a line following the incident ray down inside the core, you will find that they bend towards the normal.
Maybe you may have the misunderstanding that "the bigger the incident angle, the smaller the refraction angle". This is not true, you may give arbitrary values of n1 and n2 and calculate the refraction angle using snells law.
Hope this helps :).
@16:20, Why in index difference (delta)N=n1-n2 but in relative refractive index (delta)N1=n1-n2 and so N1 is coming out of underroot? So messed up....just hate this subject, hate this branch, hate you, hate my life.
Relative refractive index are calculated with respect to separate medium, and N1 is coming out of underfoot because if you multiply these to term (2n1)(delta n1) then you will find n1^2 and root cancels square so you get n1 only.
Index difference is nothing but the difference between refractive indices of the two medium under consideration and is denoted by (delta n = n1 - n2).
Relative refractive index is something different. It is as an index of one medium in relation to the other medium, denoted by (delta = (n1 - n2)/n1).
Note very carefully here in the first case "delta n" is a single variable means delta and n are not separate for algebraic calculation, they are treated as just one variable.
In second case delta is a separate variable and n1 and n2 are also separate variables, so here we have three separate variables, so (delta n1 here actually is delta * n1) that it is the multiplication of two algebraic variables, hence it is coming out of the square root.
Hope you understood !
😟why u hate to all cool down aakash
@@meyun4699 Just cleared this subject, this semester, and this undergraduate course somehow.😅
@@aakashgupta7211 what are you doing diploma Or btech
Very clear sir.. thank you so much
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Boss I like your voice. I am form Dhaka.
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Awesome explanation 👍
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I have one question that in your previous videos you consider n2 as core and in this you consider n1 as core does this make any difference or same . For ofc n2>n1 , is this applicable for same.
refractive index of core is always greater then cladding refractive index.
@@EngineeringFunda thanks
Yes it makes huge difference correct notation is for core n1 and for cladding n2
Thank you sir ji 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
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Great explanation
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Nice explanation
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Sir which pens you have used in this.
Mitsubishi Ballpoint Pen
Sir, when light travel from rarer to denser after refraction light bend towards normal, but in this case light travel from air to core medium light bend away from normal, how sir
Sir I can't able to understand derivation from critical angle calculation to acceptance angle calculation...plz help sir🙏🙏🙏
Clge??
1. A light wave is travelling in a semiconductor medium (GaAs) of refractive
index 3.6.It is incident on a different semiconductor medium (AlGaAs) of
refractive index 3.4 & angle of incidence is 80○. Calculate numerical
aperture & acceptance angle. Will it result in total internal reflection?
could you please tell me this question for answer sir
Did you ever get the answer for this?
thanks sir ,
its very helpfull to us....
U are really genious
Thank you so much sir for my help ❤️
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17:05 HOW TO TAKE n1 out of root. its 2n1 inside
See it properly dear, there is root(n1◇ (2n1)) that is n1 root(2◇)
Thank you sir ❤❤
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😭the pens which he is using are so satisfying
@@PanduKammalapally-j7e clge??
Thankyou Sir 👍💖
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Sir, thanks a lot. Can you please answer my query?
What if (N1)² - (N2)² is greater than 0? As values of N1 and N2 can be controlled by us, this can take place.
If this happens, then the value of sin theta will exceed 1, which is not possible. So, can you please explain this restriction.
It is not simple question, there are many tradeoff that will make system complicated.
🙏🙏 Ok, thanks a lot, sir. It would have been better if you could explain more. Anyways, thank you for replying.❤️
It's not n1 square minus n2 square. It has got root over it. So its value is never going to be more than 1. Moreover n1 will always be greater than n2 otherwise TIR will not take place.
@@Manus-hh1hd Values of n1 and n2 can be controlled by us. So, given some values, it is possible to make n1² - n2² greater than 0.
@@sarveshchandak yes can be
Thank you sir, u r explanation is clear and helpful
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Nice video 😊
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Sir,is ur good name MANJUL KUMAR?
Hitesh Dholakiya
Thank you so much sir.
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Awsm
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Good class
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Amazing teaching
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Sir isme acceptance angle ki eqn kahan hai
What is meant by n1 n2 sir
When n1 is approximately equal to n2 then n1-n2 bhi to zero ho jaega sir to n1+n2= 2n1 hone se bhi NA zero kyu nhi??
Any Tamil person here to read first RUclips channel NAME💀
Me
Maja ya😂
@@flash-s1020 neenga enta department
AI&DS@@ECE621
Neenga
Sir I have one doubt please clarify sir it is sin theta c= n2/n1 , how it sir
Same doubt
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Your welcome 🙏
@@EngineeringFunda ☺☺
TQ Sir 🥳
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@@EngineeringFunda You are helping So many students Sir, It Will Be Return To you In A better way sir 😊
For all the classes before you took n2 as refractive index of core but in this lecture you consider?n1 for core?? Isn’t that too confusing and controversial???
There is nothing about n2 and n1, only you should consider refractive index of cladding should be greater compared core index.
thank you so much sir
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Lot of ❤️s
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@@EngineeringFunda 💯THANKU SIR
thank u too much
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Very useful sir
Thank you sir...
Your positive comments motivates me, Thanks and welcome 🙏
Thank you sir
Your positive comments motivates me.
👏👏👏👏
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Thnku sir
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Sir I want to understand numerical aperture in the practical way
What is the reason behind considering acceptance cone? Why don't we consider acceptance cylinder or semicircle?
Is there any specific meaning?
brilliant
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Can you send me there notes plz....
You can download it from my android application engineering funda
@@EngineeringFundathanks sir
thank u
👍
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Sir please itne advertisement beech me mat daliye kyonki padhne me disturb hota hai...
Bhai koi international audience reach nahi hoti hindi use kyo nahi karte itne acche notes hai par hindi ke alawa itna accha nahi samajta
*You should give atleast reply on doubt comments... One dislike, just coj of that attitude. If you reply, I'll change dislike to like* 😤😤😤😒
What is the difference between Relative Refractive Index & Index Variation ???
At 15:18 , how you considered n1~ n2. If it's approx equal, then N.A. should be zero, coj (n1 -n2)= 0
Please reply me and others who have Doubt
Index variation is different of n1 and n2.
Relative Refractive index is index variation/ Refractive index
@@EngineeringFunda ... I've noted.
We know, n1>> n2, then how, n1 approx equal to n2. If we put in (n1-n2) , whole N.A. will be zero.
Also, @17:02 ...how that n1 came out of the root??
@@Pranjal90 arrey bhai, n1-n2 is not zero because that is delta(very very small value like 0.000001 which is equivalent to zero).
Also, answer to your next ques.:- it is NA=sqrt root(delta×n1×2×n1)= (n1) sqrt root(2×delta)
.
Hope it helps!
@@savantsingh4200 Thanks bro...🙂🙂😊
Too much ads in your video
plz explain in hindi
🤬🤬🤬🤬🤬 b tech in cse karte huye bhi ye padhna padta he 🤬🤬🤬🤬🤬🤬🤬🤬🤬
Thank you sir 🙏😁
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Thanks sir ❤❤
Your positive comments motivates me.
Teachers like me just wants positive comment from student.
Love from you guys means a lot to me.
My goal is to create largest community of engineers in entire globe. Please help me by sharing this playlist with your friends.
thank you so much
Your Appreciations, care and share matters a lot to me. #EnginneringLove.
All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us.
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Tq so much sir
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Thank you sir ji
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