I have seen on many internet platforms they have mentioned that snell's law is not valid for normal incidence. Even in the schools teachers use to teach that snell's law is not valid. From past three years I am regularly teaching and telling students that don't go with the misconceptions. Snell's law is valid in every condition but students Aaj line on some websites which are no authentic information. Thanks to HC VERMA SIR
And the whole india is still have that IAS/IIT fever Kisi ko na padhne ka hai na smjhne ka hai sbko bs iit me jana hai aur 9 to 5 karna hai 🥱 Hats off to you public Hc verma sir ❣️ the greatest of all time ⚡
The Symmetry concept explained here is really interesting and important. The Symmetry around the normal to interface between medium plays an important role in optical refraction. It is not something associated with light rather with the distribution of internal constituent of material through which light is passing during its refraction.... Thank you Sir, you are one of best science teacher and popularizer of our country.
The speed of light is changing in denser medium. When ray of light falls normally on the interface, then it does not bend. It means that the time period is not constant and will take longer time to pass because of less speed of light,but time period is always constant. How is this possible? Please answer this in this way not in sin i / sin r = 0 hope you will ans to my doubt
@@KavitaYadav-ul8fb Time period and frequency of a wave (the interrelation f=1/T) depends upon source frequency and due this reason unless the repeatability or periodicity of source is affected, medium is not going to affect both frequency and time period. The velocity of light varies on passing from one medium to another medium because of the variation in wavelength. C = frequency1× wavelength 1 in vacuum. When it gets into another medium C changes to let V. Then V = frequency 1× wavelength 2. The variation in the wavelength (the spatial gap between two repetitions) is the reason behind changing of velocity. Again the bending of light for case oblique incidence is beautifully explained in Electromagnetic theory. See Fresnels theory of refraction and reflection in EMT.
Light is a sine wave having plus and minus electric monopoles. Moment is necessary for bending, which requires force and moment arm. Inclined light beam has a downward component of electric field which produces downward force due to attraction between opposing electric monopoles and moment arm, as a result light beam rotates towards normal in denser medium like clock pendulum. In normal incident light beam there is no downward component of electric field or downward force. Also there is no moment arm the light beam therefore travels straight through denser medium without bending.
Voltage can be easily defined as it is a ability battery to charge electrons for example electron round in conductor and get discharge than again they came in battery and battery will charge this electron that is know as volt and it is the unit of potential diffence
I argued my science teacher regarding this topic for a whole period of 45 mins. He was saying that no refraction occurs when light incident normally to the surface but I was not satisfied because whatever the angle is... Change in velocity, wavelength, amplitude still occurs. So why not to call it refraction?? Because of only unchanged direction?? Definitely not. Because as sir mentioned here... Bending is sign of refraction but not itself refraction. I 100% convinced my teacher with my points to accept this as refraction. Thank u for he video sir... Big fan👍
in text books, these days, it is clearly written that the change in speed of light ..... is called refraction. In refraction, bending of path happens except for normal incidence. Then, why do the teachers stress on Bending...
Sir....... I would very much recommend a playlist for topics on physics...... Where you teach every basic topic in accordance with the syllabus, so that we have a uniform studying structure. And have a QnA ( question and answer) session for the topic that you have taught in the previous video. Hope you see this comment...... Thank you very much sir.... Wish you great health!!!
Sir, in following velocity in media 1/ velocity in media 2 (v1/v2) is equals to 1/u(mew).. Hence, it can be observed by refractive index is inversly proportional to velocity in media
sir if in dielectric Electric field in capacitor = Enot /k so Capcitance becomes k Cnot and P.D becomes Vnot/k but Electrostatic Energy of capacitor having dielectric=1/2CV^2 d does not becomes 1/2k Cnot ( Vnot/k)^2= initial energy/k though it becomes 1/2k ebslen E^2 which is equals to k initial energy so why not above condition satisfies.??
Thank you for the informative video, Sir! Sir I am a JEE aspirant in class 12 and I have a doubt in Ray Optics. Can we have a medium that has refractive index less than 1? It is practically not possible to obtain speed of light as being higher than vacuum but resources online state that it may be possible by the theory of relativity. Kindly help, Sir.
Sir you said, for normal incidence(0°) also snell's law is valid as asked in the doubt also, but in the book it is given snell's law is valid only of angle i is between 0 and 90. Internet showing varied answers, can you please tell?
Hello sir! Sir I've a request. Can you please make videos for the basic concepts of the physics of class 10. Like concepts that will give us a clarity well enough to solve any problem. It would be a privilege to clear my fundamentals from you sir. Thank you:)
If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct A. r = v B. r > v C. r = 1/v D. r < v Sir please explain it.
Here's the mathematical explanation , if you still have the doubt : I am representing red as r and violet as v. Wavelength r > Wavelength v => Mew v > Mew r (since wavelength is inversely proportional to refractive index) => Sin i/Sin v> Sin i/Sin r => Sin r> Sin v => r>v Hope it helps
Respected sir....if you upload all lecture of CONCEPT OF PHYSICS with questions and explanation then all market of education system of India will close ....but it's beneficial for weaker sections of society .....sir please do these.....for your satisfaction of your country......
Education chahiye free mein aur engineer banke lakho kamoyege waah re hypocrisy. Education agar free mein loge to engineer banne ke baad salary mat lena ya us salary ko daan kardena bolo hai himmat
If a pulse star is having a greater amount of gravity than a black hole than is there is a possibility that it may attract the black hole towards it if it has than why the black hole does not get bursted as the meteroids coming from the space get bursted in the upper atmosphere of earth
Hey! As we know that electrons are negatively charged ions and cathode is also a negatively electrode which means it is made of negatively charged electrons. And anode is positively charged. We know that electrons (negatively charged ions move from negative to positive electrodes) that is they move from negatively charged cathode to positively charged anode Hope you'll get it. If still there's a question, you can ask me out Thank you! Regards Urvashi :)
Thinking causally if we are travelling in a bus and suddenly brakes are applied than a wave in contact to the floor of the bus is being generated and supposing the friction acts opposite to the wave generated if we can manage to equal the magnitudes of both the generated waves then no person will get a forward push in the bus.Sir can this be possible?
Sir when a light ray travel from denser medium to rarer medium why should it bend away from the normal aur when it travels from rarer to denser medium why should it bend towards the normal
If atoms not created nor destroyed so how it is created when earth is created or if it comes from stars so how it travel in space and if atoms formed when star is destroy so it means when creating star it will create so what is the true answer
Sir i am suryaksh student of class 10 sir i want to ask that if 2 stars in the universe are having the same gravity and they may lie nearer to each other ( hopefully this doesn’t make much sense) but still the lie they what will happen if collsion occurs than tell me that what makes the collision to occur
इलेक्ट्रान किस कारण से किसी चालक में एक स्थान से दूसरे स्थान पर जाते हैं? वह बल जिसे विभव कहा जाता है यानी वोल्टेज- वह पैदा कहाँ से होता है? क्या फोटानों से !
Voltage is created from potential difference between two charged particles,if you have a positive pole and there are two electrons near it the closer electron will face more force and will have more potential than other,this difference in the potential is called potential difference.this difference is needed to create flow of electron.
🙏🏻 sir, my doubts are, What is the cause of change in speed of light after refraction? Is there any difference between slab & medium? Do speed & wavelength of light change after entering & exiting from a coloured medium? & Why does it happen?
Sir, I am Aditi Bhashkar of class 10. I want to ask you a question. My question is that, For a real and inverted image magnification (m) is taken as negative (-ve). When m
bhai tera concept hi glt h negative sign nature batata he on the basis of direction tu aisa kyu soch rha ki magnification less than 1 -ve hoga 0.5 negative value thode h
I appreciate the curiosity and imagination of Shivam Saurabh...keep it up👍👍👍
True
Very nice explanation Sir. Thank you
To understand refraction of light ICSE 2020-21 of class 10
m.ua-cam.com/play/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3.html
Mere ye saal yahin doubt aya
@@rkp8495 pagal sala.nonsense
THANKS SIRRR.
MY CONCEPTS ARE CLEAR NOW....
THANKS ONE AGAIN SIR....💕
Awsm......
Bhai how came you ask this doubt? Did you speed post or something like else
Keep it up Kid. Well done.
The doubt was indeed a good one for any science enthusiast and I'll applaud you for this , this things came in every single sci. Loving boy ;))
You are a curious brain, just keep thinking in this way, u have a scientific mind
Maan u r a great teacher .
The curiosity inside u for giving knowledge is something!!
Full respect sir!!!
God is that you ??😱
I will be sure to tell all of my friends about this channel 😘
To understand refraction of light ICSE 2020-21 of class 10
m.ua-cam.com/play/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3.html
I have seen on many internet platforms they have mentioned that snell's law is not valid for normal incidence. Even in the schools teachers use to teach that snell's law is not valid. From past three years I am regularly teaching and telling students that don't go with the misconceptions. Snell's law is valid in every condition but students Aaj line on some websites which are no authentic information. Thanks to HC VERMA SIR
And I wrote my own theory and it appears to be correct
"Bending is because of refraction, refraction itself is not bending"... Class 10 ncert left the chat🗿
😂
Let class 10 NCERT go to hell..... Here is the physicist to decide what is refraction 😂😂
@@hasnainraza022 ya thats fundamentally correct but BOARD perspective se galat.
What to do.😭
And the whole india is still have that IAS/IIT fever
Kisi ko na padhne ka hai na smjhne ka hai sbko bs iit me jana hai aur 9 to 5 karna hai 🥱 Hats off to you public
Hc verma sir ❣️ the greatest of all time ⚡
Thank you sir.This was very useful.Respect from sri lanka 🇱🇰
I have got nothing to do with this topic but still I m watching just because I love watching his teachings......
💞💞💮💮
Sir you are one of the best physists .....of the world.....
The Symmetry concept explained here is really interesting and important. The Symmetry around the normal to interface between medium plays an important role in optical refraction. It is not something associated with light rather with the distribution of internal constituent of material through which light is passing during its refraction....
Thank you Sir, you are one of best science teacher and popularizer of our country.
The speed of light is changing in denser medium. When ray of light falls normally on the interface, then it does not bend. It means that the time period is not constant and will take longer time to pass because of less speed of light,but time period is always constant. How is this possible? Please answer this in this way not in sin i / sin r = 0
hope you will ans to my doubt
@@KavitaYadav-ul8fb Time period and frequency of a wave (the interrelation f=1/T) depends upon source frequency and due this reason unless the repeatability or periodicity of source is affected, medium is not going to affect both frequency and time period. The velocity of light varies on passing from one medium to another medium because of the variation in wavelength. C = frequency1× wavelength 1 in vacuum. When it gets into another medium C changes to let V. Then V = frequency 1× wavelength 2. The variation in the wavelength (the spatial gap between two repetitions) is the reason behind changing of velocity. Again the bending of light for case oblique incidence is beautifully explained in Electromagnetic theory. See Fresnels theory of refraction and reflection in EMT.
Same question was eating my mind,now I am satisfied with the answer.
Thanks for giving clear concept
👍
Same question came in my mind
Thatswhy i was searching a good explanation and i found this clip
I had the same confusion but now it is crystal clear thanks a lot sir ❤️❤️❤️
Best explanation to this problem....
Light is a sine wave having plus and minus electric monopoles. Moment is necessary for bending, which requires force and moment arm. Inclined light beam has a downward component of electric field which produces downward force due to attraction between opposing electric monopoles and moment arm, as a result light beam rotates towards normal in denser medium like clock pendulum. In normal incident light beam there is no downward component of electric field or downward force. Also there is no moment arm the light beam therefore travels straight through denser medium without bending.
I also had the same doubt
Thank you so much sir ❤️
Ohh till now I thought that mathematics and physics failed at this point but he proved it right so 😂😂😂😂😂😂😂😂😂.
Sir you are a genius ❤❤❤❤❤
One word : Genius
Shivam saurav u r too good yaar.... Thnkzz fr asking sch a good question
Thanku sir . You are a real physician
you meant physicist?? lol
The only teacher who cleared me this question thank u very much sir 🙏
The fact that he didnt change even a single word of his legendary book from past so many years is astonishing. His books are just so accurate.
Beautiful explanation
Thanks sir.. You are the best.
Wow amazing questions 👍👍🙏🚩🚩🚩
वोल्टेज क्या है सर कृपया इस पर कोई वैज्ञानिक दृष्टिकोण वाला वीडियो बनाए !
Voltage can be easily defined as it is a ability battery to charge electrons for example electron round in conductor and get discharge than again they came in battery and battery will charge this electron that is know as volt and it is the unit of potential diffence
Sir you are my role modern and I am also from Bihar.
I argued my science teacher regarding this topic for a whole period of 45 mins. He was saying that no refraction occurs when light incident normally to the surface but I was not satisfied because whatever the angle is... Change in velocity, wavelength, amplitude still occurs. So why not to call it refraction?? Because of only unchanged direction?? Definitely not. Because as sir mentioned here... Bending is sign of refraction but not itself refraction. I 100% convinced my teacher with my points to accept this as refraction. Thank u for he video sir... Big fan👍
Omg it happened with me too but my teacher did not agreed
in text books, these days, it is clearly written that the change in speed of light ..... is called refraction. In refraction, bending of path happens except for normal incidence. Then, why do the teachers stress on Bending...
Sir. Thermodynamics k entropy ki video upload kijiye..
Nice explanations sir ..
I am a big fan of yours and I love science
No doubt sir is authority of physics
Sir
Upload a video on Schrodinger equation derivations
Nice question and solution
Thank uh sir🙏 it is very useful
Very nice question and very clear explanation. Thank you sir.
U r my favourite teacher sir..
Mind blowing sir
Is force required to move a electron increases by increasing its mass?if yes then why?
Sir ,please make a lecture on diffraction of light.
Sir....... I would very much recommend a playlist for topics on physics...... Where you teach every basic topic in accordance with the syllabus, so that we have a uniform studying structure. And have a QnA ( question and answer) session for the topic that you have taught in the previous video.
Hope you see this comment...... Thank you very much sir.... Wish you great health!!!
To understand refraction of light ICSE 2020-21 of class 10
m.ua-cam.com/play/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3.html
I agree with you!
😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃
Thank you sir , It is also my doubt .
Wow man such a great question.....
Sir, in following velocity in media 1/ velocity in media 2 (v1/v2) is equals to 1/u(mew).. Hence, it can be observed by refractive index is inversly proportional to velocity in media
Sir please make a video on expression of drift velocity as many say the expression given in your book is incorrect
sir if in dielectric Electric field in capacitor = Enot /k so Capcitance becomes k Cnot and P.D becomes Vnot/k
but Electrostatic Energy of capacitor having dielectric=1/2CV^2 d does not becomes
1/2k Cnot ( Vnot/k)^2= initial energy/k
though it becomes 1/2k ebslen E^2 which is equals to k initial energy
so why not above condition satisfies.??
Thank you for the informative video, Sir! Sir I am a JEE aspirant in class 12 and I have a doubt in Ray Optics. Can we have a medium that has refractive index less than 1? It is practically not possible to obtain speed of light as being higher than vacuum but resources online state that it may be possible by the theory of relativity. Kindly help, Sir.
I also had the same doubt and wanted to ask it to someone... Now I got it. How can I ask other doubts to you sir ?
Thank you so much sir ❤️
Love you sir, you are a gem🎉🎉🎉
Thank you so much sir😇😇🤩😌😊
Sir please can you teach.optics full course on UA-cam??? It would be really helpful since boards exam will be there from February 15th 2022
Thanks so much sir
Sir you said, for normal incidence(0°) also snell's law is valid as asked in the doubt also, but in the book it is given snell's law is valid only of angle i is between 0 and 90. Internet showing varied answers, can you please tell?
Sir , When we talk about optically rarer or denser medium .... What it actually is ? Can you please explain it......
Me too also same question came in my mind and i was searching answer and I got this now I got it😃😃😊
Thanks sir for giving me knowledge. You are great. 🙏🙏
Hello sir!
Sir I've a request. Can you please make videos for the basic concepts of the physics of class 10. Like concepts that will give us a clarity well enough to solve any problem.
It would be a privilege to clear my fundamentals from you sir.
Thank you:)
ua-cam.com/video/ujAMoTmqDdc/v-deo.html
Does the depth of tank with water change or remain same when viewed normally?
Nive explanation sir❤️❤️
If a beam of red light and a beam of violet light are incident at the same angle on the
inclined surface of a prism from air medium and produce angles of refraction r and v
respectively, which of the following is correct
A. r = v
B. r > v
C. r = 1/v
D. r < v
Sir please explain it.
Here's the mathematical explanation , if you still have the doubt :
I am representing red as r and violet as v.
Wavelength r > Wavelength v
=> Mew v > Mew r (since wavelength is inversely proportional to refractive index)
=> Sin i/Sin v> Sin i/Sin r
=> Sin r> Sin v
=> r>v
Hope it helps
Sir please describe the parallel plate capacitor concept and working
The great sir....
Respected sir....if you upload all lecture of CONCEPT OF PHYSICS with questions and explanation then all market of education system of India will close ....but it's beneficial for weaker sections of society .....sir please do these.....for your satisfaction of your country......
pawan Kumar To understand refraction of light ICSE 2020-21 of class 10
m.ua-cam.com/play/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3.html
Education chahiye free mein aur engineer banke lakho kamoyege waah re hypocrisy.
Education agar free mein loge to engineer banne ke baad salary mat lena ya us salary ko daan kardena bolo hai himmat
If a pulse star is having a greater amount of gravity than a black hole than is there is a possibility that it may attract the black hole towards it if it has than why the black hole does not get bursted as the meteroids coming from the space get bursted in the upper atmosphere of earth
Sir please clear difference between electric potential and electric potential in circuit
Sir, why electron move from cathode to anode in electrolite solution (battery machinisim)??
Hey!
As we know that electrons are negatively charged ions and cathode is also a negatively electrode which means it is made of negatively charged electrons.
And anode is positively charged. We know that electrons (negatively charged ions move from negative to positive electrodes) that is they move from negatively charged cathode to positively charged anode
Hope you'll get it.
If still there's a question, you can ask me out
Thank you!
Regards Urvashi :)
Sir it is possible to give lift to rocket with the help of solar power
Love you sir....
Sir how one can say light is an electromagnetic wave? what is the theoretical or experimental proof?
Somebody tell me how can I ask to sir
Wow... What an explanation sir !!! 😍😍
Sir can you please explain why we take sin only not other trignometrical ratios.
Yess sir please tell..
Sir please tell me that does water reflect or refract light????????
Sir I want ti learn from you but I don't know how pls tell me.
Sir my question is why the speed of light equal in vaccum and air but it slow down in water
Sir what would be speed of sound in neutron star
Putting any value as answer will fulfill the criteria
Thinking causally if we are travelling in a bus and suddenly brakes are applied than a wave in contact to the floor of the bus is being generated and supposing the friction acts opposite to the wave generated if we can manage to equal the magnitudes of both the generated waves then no person will get a forward push in the bus.Sir can this be possible?
Sir plz tell the reason why the ray passing through normal remains undeviated during refraction
Sir when a light ray travel from denser medium to rarer medium why should it bend away from the normal aur when it travels from rarer to denser medium why should it bend towards the normal
Thanks sir for concept my level I study in class 10th
If atoms not created nor destroyed so how it is created when earth is created or if it comes from stars so how it travel in space and if atoms formed when star is destroy so it means when creating star it will create so what is the true answer
Why the refraction doesn't take place in the optic centre of lens
Great .....
Sir i am suryaksh student of class 10 sir i want to ask that if 2 stars in the universe are having the same gravity and they may lie nearer to each other ( hopefully this doesn’t make much sense) but still the lie they what will happen if collsion occurs than tell me that what makes the collision to occur
So the conclusion is 'when light is incident normally on a boundary'. Refraction occurs,am I right?
Thank you 😊sir
Hello Sir.Can you upload a video on AC Inductance Circuits
इलेक्ट्रान किस कारण से किसी चालक में एक स्थान से दूसरे स्थान पर जाते हैं? वह बल जिसे विभव कहा जाता है यानी वोल्टेज- वह पैदा कहाँ से होता है? क्या फोटानों से !
Voltage is created from potential difference between two charged particles,if you have a positive pole and there are two electrons near it the closer electron will face more force and will have more potential than other,this difference in the potential is called potential difference.this difference is needed to create flow of electron.
Sir could you please explain, when a car is in 60kmph or any other then the angular velocity of tyre
It depends upon the radius of the tyre
If the angle of incidence is lesser than zero then what is the angle of refraction becomes?
Well explained
Love u sir😍😍😍
Sir 11 class ka video share kijiye please
Vector and addition of vector and from first chapter principal of homogenety
Please.......,.....
Sir but then if we will use 2nd Formula i.e. v1/v2 then we will get different answer in comparison with sin i/ sin r... But it must be same na?
🙏🏻 sir, my doubts are, What is the cause of change in speed of light after refraction? Is there any difference between slab & medium? Do speed & wavelength of light change after entering & exiting from a coloured medium? & Why does it happen?
Sir, I am Aditi Bhashkar of class 10.
I want to ask you a question.
My question is that,
For a real and inverted image magnification (m) is taken as negative (-ve). When m
Negative m means the image is inverted and m
It is not necessary that if M < 1 than the magnification is negative
Negative sign indicates inverted image
Just take magnitude if it is >1 enlarged positive and negative signs are taken only for direction above or below the principal axis
bhai tera concept hi glt h negative sign nature batata he on the basis of direction tu aisa kyu soch rha ki magnification less than 1 -ve hoga 0.5 negative value thode h