REFRACTION OR NO REFRACTION in normal incidence

[@ujjwalsiingh]

I appreciate the curiosity and imagination of Shivam Saurabh...keep it up👍👍👍

[@programmingwithyadavs8566]

True

[@eurekaeureka8810]

Very nice explanation Sir. Thank you

[@akshatshah3961]

To understand refraction of light ICSE 2020-21 of class 10 m.kzbin.info/aero/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3

[@Theadityanayak723]

Mere ye saal yahin doubt aya

[@prashantkumar09876]

@@rkp8495 pagal sala.nonsense

[@shivamsaurabh5586]

THANKS SIRRR. MY CONCEPTS ARE CLEAR NOW.... THANKS ONE AGAIN SIR....💕

[@Bikashkumar-rz2ns]

Awsm......

[@VishalKumar-nz2mz]

Bhai how came you ask this doubt? Did you speed post or something like else

[@triptirbauddh2003]

Keep it up Kid. Well done.

[@VishalKumar-nz2mz]

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 ;))

[@User-rb9ou]

You are a curious brain, just keep thinking in this way, u have a scientific mind

[@rudranshshukla7915]

Maan u r a great teacher . The curiosity inside u for giving knowledge is something!! Full respect sir!!!

[@fight-or-flight6352]

Thank you sir.This was very useful.Respect from sri lanka 🇱🇰

[@siddharth3704]

God is that you ??😱 I will be sure to tell all of my friends about this channel 😘

[@akshatshah3961]

To understand refraction of light ICSE 2020-21 of class 10 m.kzbin.info/aero/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3

[@yashasviarya1314]

I have got nothing to do with this topic but still I m watching just because I love watching his teachings...... 💞💞💮💮

[@Samiullah-lb3wg]

Sir you are one of the best physists .....of the world.....

[@priyabratadash381]

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.

[@KavitaYadav-ul8fb]

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

[@priyabratadash381]

​@@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.

[@Akki14x]

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 ⚡

[@shivaniverma5366]

I had the same confusion but now it is crystal clear thanks a lot sir ❤️❤️❤️

[@abhishekdwivedi.physics]

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

[@kuroshite]

And I wrote my own theory and it appears to be correct

[@abhaykumarmaurya1558]

Same question was eating my mind,now I am satisfied with the answer.

[@vineetverma1627]

Best explanation to this problem....

[@sparshtyagi1335]

Same question came in my mind Thatswhy i was searching a good explanation and i found this clip

[@kulkarnichaitanyasadanand7222]

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👍

[@maskedguy2806]

Omg it happened with me too but my teacher did not agreed

[@KNarasimhaSwamy1]

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...

[@rajarya7482]

​@@KNarasimhaSwamy1 They only care about teaching bending of rays because that is what is more important for the EXAM. So much that we forget refraction is not just bending of light.

[@VikramYadav-fn7fi]

Ohh till now I thought that mathematics and physics failed at this point but he proved it right so 😂😂😂😂😂😂😂😂😂. Sir you are a genius ❤❤❤❤❤

[@jagabandhumarndi1527]

Wow amazing questions 👍👍🙏🚩🚩🚩

[@nitusingh5088]

I also had the same doubt Thank you so much sir ❤️

[@ansh1757]

Thanku sir . You are a real physician

[@ItsLakshyaPratap]

you meant physicist?? lol

[@n.s.bhakuni8850]

U r my favourite teacher sir..

[@pragyatripathi7397]

The only teacher who cleared me this question thank u very much sir 🙏

[@AshishRaj-m1z]

Thanks for giving clear concept

[@AshishRaj-vz2sf]

👍

[@AnushaHaveri]

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.

[@suramamishra5907]

Are you really the writer of HC Verma Unbelievable You are great sir 🙏🙏🙏 Your questions are really very amazing and help me a lot for my exam . A lot of love 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@bidhanbanerjee1165]

Very nice question and very clear explanation. Thank you sir.

[@RevolutionEducation]

Wow... What an explanation sir !!! 😍😍

[@PratapgarhHUB]

वोल्टेज क्या है सर कृपया इस पर कोई वैज्ञानिक दृष्टिकोण वाला वीडियो बनाए !

[@vivekbhawsar77882]

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

[@DeepKumar-cn4wg]

Shivam saurav u r too good yaar.... Thnkzz fr asking sch a good question

[@sunnykumarpandey6546]

One word : Genius

[@zakirhussain-js9ku]

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.

[@feelphysics7229]

Sir you are my role modern and I am also from Bihar.

[@pawanKumar-se8we]

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......

[@akshatshah3961]

pawan Kumar To understand refraction of light ICSE 2020-21 of class 10 m.kzbin.info/aero/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3

[@rishabhdroy478]

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

[@sanskaragarwal7667]

I am a big fan of yours and I love science

[@pranavdubey2416]

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!!!

[@akshatshah3961]

To understand refraction of light ICSE 2020-21 of class 10 m.kzbin.info/aero/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3

[@ridhimanagari1288]

I agree with you!

[@abhishekyadav7853]

😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃

[@assadullahnaseerani8481]

No doubt sir is authority of physics

[@pankajkumartowar3070]

Love you sir, you are a gem🎉🎉🎉

[@ashifraza434]

Why we use "sin" in (sin i/ sin r) why don't we use other trigonometric functions like cos, tan etc. instead of "sin"?? Sir please 🙏 answer me, I am very confused😢

[@Flashy_itachi]

Because of angle and we take perpendicular not base from ang theta.

[@adhyatiwari4197]

Thank you so much sir😇😇🤩😌😊

[@Theysayananya]

"Bending is because of refraction, refraction itself is not bending"... Class 10 ncert left the chat🗿

[@hasnainraza022]

😂

[@hasnainraza022]

Let class 10 NCERT go to hell..... Here is the physicist to decide what is refraction 😂😂

[@Theysayananya]

@@hasnainraza022 ya thats fundamentally correct but BOARD perspective se galat. What to do.😭

[@Anamika7ucs]

Fr

[@Happy-sp9mn]

😢​@@Theysayananya

[@tanishqchhabra4505]

I searched whole internet for this

[@abhisheksahu5541]

Sir. Thermodynamics k entropy ki video upload kijiye..

[@ridhimanagari1288]

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:)

[@pranjulrajpoot2030]

kzbin.info/www/bejne/q5ukfqKKotZ3msU

[@kanchansahani646]

Me too also same question came in my mind and i was searching answer and I got this now I got it😃😃😊

[@jaymahakal7516]

Thanks sir.. You are the best.

[@Aditya_Tiwari___]

Wow man such a great question.....

[@fasteducationfasteducation8973]

Thanks sir for giving me knowledge. You are great. 🙏🙏

[@sginstituteofknowledge1295]

Excellent explanation Thank you sir

[@cookwithpakeeza8281]

Thanku sir i was having this confusion for about 3 days so kind of u and appreciate one who asked the question thanku soo so much dear

[@its_rohit_0506]

Sir is amazing .Who agree to me hit like button

[@kushagraraj1619]

Sir can you please explain why we take sin only not other trignometrical ratios.

[@dikshitanath5529]

Yess sir please tell..

[@arpitadas3005]

Thank uh sir🙏 it is very useful

[@tulika._sen]

Sir, U r god for me....

[@AngadSingh-asm]

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.

[@AyushKumarSingh-u1c]

Putting any value as answer will fulfill the criteria

[@priyanshudubey9783]

Thanks sir for concept my level I study in class 10th

[@Vineetchaudhary9759]

Sir Upload a video on Schrodinger equation derivations

[@satyamgupta3027]

Thank you sir , It is also my doubt .

[@dgs327]

Is force required to move a electron increases by increasing its mass?if yes then why?

[@ABHISHEKSINGH-tw3ti]

Nive explanation sir❤️❤️

[@ajayjha53]

Beautiful explanation

[@justvibing9663]

Sir plz explain tension forces in pulley problem like why we take sometimes T -mg=ma mg -T =ma Also ,friction confuses me like where to apply pseudo force

[@Musinix]

Ummmm If I'm not wrong it's because of the direction. I mean it depends on the direction where the pulley is moving(Maybe cause I'm not sure as I studied it two years ago)

[@deepaksah2840]

make eqn forces in the direction of movement - forces in the opposite direction of movement

[@PratapgarhHUB]

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 !

[@rajathiray9031]

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.

[@soumyajeetnayak1512]

Mind blowing sir

[@abhijitbanerjee771]

Sir I love the way you teach

[@kalpshah9681]

Sir, why electron move from cathode to anode in electrolite solution (battery machinisim)??

[@urvashiagrawal6362]

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 :)

[@MyfamilyVideos-qv7um]

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

[@wonderfulworld6653Anushka]

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

[@Itsme-kb9eq]

Negative m means the image is inverted and m

[@sparshtyagi1335]

It is not necessary that if M < 1 than the magnification is negative

[@rrr210100]

Negative sign indicates inverted image

[@rrr210100]

Just take magnitude if it is >1 enlarged positive and negative signs are taken only for direction above or below the principal axis

[@ucchihaitachi4243]

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

[@Lonemehtab]

So the conclusion is 'when light is incident normally on a boundary'. Refraction occurs,am I right?

[@Ricin2007]

Thank you 😊sir

[@sakshamsain4238]

Somebody tell me how can I ask to sir

[@physicsmyntra629]

Nice explanations sir ..

[@M.S_Dhoni1.0]

Sir please tell me that does water reflect or refract light????????

[@hibikeeupho-x6x]

How can Sin i/Sin r = u If m/s would be cancelled

[@praveenphysicalscience]

Sir when two media are given how do we consider n1 and n2 Sometimes n1 is air sometimes n2 is water And vice-versa. Could you please explain

[@sirrudra1921]

Nice question and solution

[@amanjain90]

Sir...apne kaha ...light does not bend because it has many options of directions to bend in this case by the angle 10 degrees ...but second law says the incident ray , normal and refracted ray all lie in same plane...then it will have only two directions to bend either left or right with an angle..

[@omsurjyakantasahu675]

🙏🏻 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?

[@santoshtripathi3427]

Sir I have a question that can we see images without any screen behind it and how we able to see rainbow 🌈?? Please tell me sir🙏🙏

[@rushikeshmane8204]

We can see images without screen by hologram technology And rainbow is because of sunlight spectrum through tiny rain drops

[@Mahesh_Shenoy]

Respectfully disagree with the professor here. Refraction is defined as bending of light! This is what Oxford dictionary says "the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density." Wiki says "In physics, refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium." By that definition, EM waves do not bend, and hence do not refract, when they are incident normally!

[@Prawez746]

Can you make on this topic?🙏

[@neshantsingh8690]

Sir ,please make a lecture on diffraction of light.

[@asthamishra3148]

Hlo sr Sr plz answer my doubt How can we make refractive index of two medium same ? Does by doing so things are going to be invisible ?

[@jaidityayadav8003]

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 ?

[@rishabhsoni4337]

SIR I am a student of Class 10 And I have a problem Nobody ( Teacher of my school ) Help me :- please help me sir .🤒( Work = Energy then If Work = Zero then is it possible that the Energy is also =0 which is not possible 🤔 When is it possible then Conservation of Energy is wrong Theory Of Relativity is wrong?

[@ArunjyotiRath]

Brother you are a nice question seeker 😅,me too like you ,I just came to class 10th this year,you are right if no work then no energy because work and energy are interrelated as written in class 9th,if you have energy you can do work if you can work you can transfer or store energy.

[@refatullashaikh400]

Sir In class 8 there is no idea about Trigonometry. .Thn how will I teach the 2nd law of refraction ?

[@refatullashaikh400]

@SHM thank you sir

[@Angel_queen470]

@Shivam How'd you send him questions?

[@ashishramola6861]

When i was in class 8 teacher used to say yaad krlo 😭

[@Itsme-xh9ep]

@@ashishramola6861 same here yrr😅

[@akshatshah3961]

To understand refraction of light ICSE 2020-21 of class 10 m.kzbin.info/aero/PLpzWoho73qlLxP-6B-XNaa3aYXXiLxUN3

[@manjusingh6400]

Thank you so much sir ❤️

[@deepaksir4092]

Sir why we are using only sin not any other trigonometricalfunction in Snell law. Please sir

[@horizonofmutiverse6223]

Snell law was derived in terms of sin function. There is nothing special just mathematical derivation.

[@thedictator1454]

I can derive it, it is very simple buddy

[@punitjain820]

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

[@YZ_KRaZee]

Sir aapki book ''concepts of physics '' me drift velocity ka Jo formula hai vo galat hai....kyuki hamm single electron ki nhi multiple electron ki average velocity lete hai matlb Sahi equation hoga (V=eEt/m).wo V=eEt/2m single particle ke liye aayega . Sir mujhe 1 bar confirm kr dijiye comment krke

[@i.a.u.e.i.e.u.7445]

Sir I'm student of class 10 2022-2023 and I'm CONFUSED because in our NCERT The second law of refraction says The ratio of sine of angle of incidence to the sine of angle of refraction is a constant for the light of given colour and for the given pair of media This law is also known as snell's law of refraction **And SNELL'S LAW SAY THAT THIS IS TRUE THAT ANGLE OF INCIDENCE NEVER BE EQUAL OR PERPENDICULAR TO 90° ( 0

[@vaishnavireddy6582]

Thank you so much sir because I always had this this question in my mind but I always got answer that normal incidence is an exception of snell's law but that answer never satisfied me and I got this video at the right time 😊

[@deepakkumarsharma3588]

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.

[@sanchitamondal3495]

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

[@advarbindkumar5791]

Sir i am ashutosh. I study in class 10. Sir I have a doubt in the ohm's law that I=Q/T therefore Q=I×T V=W/Q putting Q=I×T Therefore V=W/(I×T) that implies V is inversely proportional to I then how can it be V be directly proportional to I according to Ohm's law.

[@sportsindia7891]

I hope you will be next IIT topper 🙂🙂

[@drsmpandit]

Hello Ashutosh ! Nice to see the questioning attitude. One approach to answering your question is as follows: BRIEF, ONE LINE ANSWER: V not inversely proportional to I, because W / t is not a constant. -EXPANDED EXPLANATION: -> Whenever we wish to convert an equation expressed in the form of proportionality to the form of equality, we introduce a constant. --> Likewise, following the same logic, if we wish to convert an equation in the equality form to a proportionality form to establish the proportionality between two quantities, we have to ensure that the remaining quantities are CONSTANT. --> By this logic, in the above equation, where we have V=W/(I x t), we could have said V is inversely proportional to I, ONLY IF the remaining part on right hand side, W/t, is constant. However, that is not the case. W/t is work done divided by time, which is the same as power. If Voltage is varied, then for a given resistor, the power in the circuit will NOT remain the same. --> to take the arithmetic steps that you have taken one step further, we could say that W/t = P (Power). Since Power = VI, we can now say that V = V I / I, i/e., V = V, which is consistent. --> To put it differently, to infer that V is inversely proportional to I, in contradiction to Ohm's law, we will have to establish that W/t, i.e., Power P in the circuit is a constant for varying voltage or current, which is not true. As you increase the voltage applied to a resistor, we observe experimentally beyond doubt that current increases. Since Power is product of V and I, as both increase, P will also increase considerably, not remain constant.

[@advarbindkumar5791]

@@drsmpandit Thank u so much for paying your expensive time. Now I have understood the nuances. Thanks again.

[@santoshkumarshripur9571]

Sir my question is why sin is taken in Snell's law

[@a.k2767]

But sir if you will go under transparent water tank perpendicular to water surface you observe that your body is being refracted for outside observation

[@nafeesalam7929]

Sir Aap se gujaarish h ki , purA eleven and twelth ka ek , ek concept lecture ke through complete kar dijiye, taaki pura concept clear ho aur question ke saath.

[@adshanpvt6790]

Hello sir ❤️❤️❤️ I m from Kashmir and my question is that in case of no refraction r the two mediums same??????

[@bossinfinite9742]

If medium are same it will be no refraction it is another reason of no refraction

[@bossinfinite9742]

Medium will be different if a ray fall on normal

[@amisharamkar6820]

If the answer is 0/0 form Plzzz use the L'hospital rule You can find some specific value for the refraction 👍

[@sumantripathi5391]

Bro it is used when we ask the value of x/x where x is just more or less than zero but here there is exactly zero by zero so it is indeterminate In short this is not x ➡0 it is x=0 so you can't find specific value

[@Astro-ms6zo]

Hehehee 0/0 is a indeterminate.

[@vnbllab]

There need to apply limit

[@saanvi3106]

Good evening sir..I am saanvi, studying in 10 standard.. sir I confusion ...it is always said that potential difference is directly proportional to current..which is further equal to charge ×time..which states that potential difference is directly proportional to charge..but according to potential difference definitions V=W/Q....which means charge is inversely proportional...so I am not able to understand it??

[@basicswithme0029]

See as I understood charge and current are different things and you are mixing them up. And you are not satisfied them tell me again it may happen that I don't understood you problem .🙏

[@gardening_vibes]

You are indirectly referring to Ohm's law while stating potential difference is directly proportional to current. The only misinformation is that Ohm's law is not always valid, it has many exceptions. Whereas while talking to the definition, a) Potential difference= Work done/charge b) Current= Charge/time; Both above equation are general statements and is always valid.

[@PhoenixFF00]

Hey where are you from???have you ever been to Chennai???

[@phantomagent7]

the refractive index of water with respect to air is not defined when the incident angle is 0 degrees

[@punitjain820]

Sir i wanted to know how the formula e= mc^2 orignate means how Einstein proof it and also want understand the significance of this formula

[@lalitkaushik3364]

Search the derivation of E=mc²; and if you want to know the significance of this formula just go and study class 12 modern physics and then you will go to study bsc physics special theory of relativity.