TIR in Rainbow?

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  • เผยแพร่เมื่อ 24 ธ.ค. 2024

ความคิดเห็น • 385

  • @nainsiharsh8447
    @nainsiharsh8447 4 ปีที่แล้ว +219

    Sir your explanation is very different from other and it is excellent.

    • @stcks.rajeshsrivastava4096
      @stcks.rajeshsrivastava4096 4 ปีที่แล้ว +1

      ISC Physics - CE AMPLIFIER using NPN Transistor 🔥🔥 th-cam.com/video/9eMqZS9mYl0/w-d-xo.html 🔥🔥

    • @theUnmeshraj
      @theUnmeshraj 4 ปีที่แล้ว +9

      Stay away from this click bait 👆🏻👆🏻👆🏻

    • @aayushshanbhag473
      @aayushshanbhag473 4 ปีที่แล้ว +1

      A true statement

    • @laxmipriyarout6515
      @laxmipriyarout6515 3 ปีที่แล้ว

      He is a legend

    • @Amritabeautiful
      @Amritabeautiful 2 ปีที่แล้ว

      And this is the correct explanation

  • @rohitgupta-ro8pl
    @rohitgupta-ro8pl 2 หลายเดือนก่อน +6

    Brilliant explanation. G.O.A.T of physics.

  • @Noob-sk3cp
    @Noob-sk3cp 4 ปีที่แล้ว +85

    Sir ,
    I personally believe, that You and the people like you are actual diamonds of our country.

    • @binay413963
      @binay413963 3 ปีที่แล้ว +3

      They are
      In fact prudentially also,their GDP share is as good as a rare gem
      (Take the GDP of HC verma book and add the amount of people it educates which later help country...He has more value then diamonds)

    • @utkarshkulshrestha8652
      @utkarshkulshrestha8652 ปีที่แล้ว

      @@binay413963 fax

    • @Shivam-Kushwaha369
      @Shivam-Kushwaha369 3 หลายเดือนก่อน

      So I am coal 😢😅

  • @subhajitghosh8221
    @subhajitghosh8221 4 ปีที่แล้ว +67

    Another prestigious civilization award is waiting for this great teacher

  • @arpitaagarkar312
    @arpitaagarkar312 2 ปีที่แล้ว +7

    Thanks Verma Ji for being the leading light in our lives

  • @pia31415
    @pia31415 4 ปีที่แล้ว +34

    Great Explanation. A Physics Teacher myself, this is a very common mistake in many Indian textbooks (saying that it's TIR). Another argument could be if it is TIR the clarity of a Rainbow would be much better! (Hence proved ad absurdum)

    • @swiftboo8120
      @swiftboo8120 ปีที่แล้ว +4

      As a learning student, I would like to point another important observation that most of the teachers don't spend much time researching on the topics and don't generally bother to verify the authenticity of their understanding about a particular topic. In class 10th NCERT no word as TOTAL INTERNAL REFLECTION is used but many teachers falsely misinterpret things and link the phenomenon of rainbow formation to it.

    • @stormplayzop223
      @stormplayzop223 ปีที่แล้ว +3

      ​@@swiftboo8120In NCERT Book TIR is not mentioned, but you will commonly find TIR in many popular books.

  • @Abhi-ju6tr
    @Abhi-ju6tr 14 วันที่ผ่านมา

    I had the same thought and argued with many of my friends but their whole backing was different books nd their writers proving it to be a TIR. One fine day i came across this video nd well.. I was able to prove everyone wrong. Thanks you sir for this beautiful explanation.. Always a pleasure to watch u

  • @Akshat.00
    @Akshat.00 หลายเดือนก่อน

    I asked my science teacher and she said that it is nature's phenomena that reflection occurs. THANKS FOR YOUR EXPLANATION SIR JI!!!!!!!!!🔥🔥🔥🔥🔥🔥

  • @roushansingh7884
    @roushansingh7884 2 ปีที่แล้ว +3

    Woah.. amazing explanation sir.. heartly thanks from a 2023 jee aspirant!

  • @Upriseclasses
    @Upriseclasses 4 ปีที่แล้ว +15

    This video just gives the great insight in a very simple way

  • @dhirajrathod6002
    @dhirajrathod6002 ปีที่แล้ว

    His smile and way of teaching says everything

  • @aryandonkada4543
    @aryandonkada4543 ปีที่แล้ว +4

    Sir, though we have conveniently taken the raindrop as a sphere, they are not perfectly spherical in real life so we might or may have total internal reflection since the angles inside the drop need not be equal

  • @gangeshkumar7185
    @gangeshkumar7185 4 ปีที่แล้ว +11

    Sir maine hc verma part 1 and part 2 dono properly solve kar liya hai par aapse ek request hai ki aap question for short answer ka v answer with some clue de dijiye isse students ko sochne me aasani hogi and these are very good questions to clear all the concept

  • @unknownt798
    @unknownt798 3 ปีที่แล้ว

    Sir I love your teaching because of your smile which you gives while teaching

  • @devamdadhia3393
    @devamdadhia3393 2 ปีที่แล้ว +1

    Thank you sir
    It has been my doubt for many days but today its cleared

  • @important3985
    @important3985 3 ปีที่แล้ว +4

    Extremely simple yet elegant . In ncert 12th this concept is written in a little confusing manner !

    • @hbplayz4428
      @hbplayz4428 2 หลายเดือนก่อน

      Well im in 10h and was curious so came around here heard cbse gave a question regarding internal reflection and students assumed the answer mus be tir.

  • @Divyansho1sharma
    @Divyansho1sharma 10 หลายเดือนก่อน +1

    Legendary Explanation
    Really helpful❤

  • @raviaditya9142
    @raviaditya9142 4 ปีที่แล้ว +5

    Great video sir
    The explanation was wonderful....

  • @manjukhator5016
    @manjukhator5016 4 ปีที่แล้ว +55

    Sir this concept is present in your book-
    Foundation Science Physics by HC Verma class 10

  • @umasrivastava4142
    @umasrivastava4142 4 ปีที่แล้ว +5

    Thank you sir. Please take care of yourself 🙏🙏

  • @gangeshkumar7185
    @gangeshkumar7185 4 ปีที่แล้ว +5

    You are great sir Congratulations sir to get padma shree award 😘😘😍😍😍

  • @bhawishyazutshi9702
    @bhawishyazutshi9702 3 ปีที่แล้ว +7

    The reason could be of what you are saying is the water droplet is not a perfect Circle(sphere rather) so radius is not equal at both sides

    • @black_crest
      @black_crest 3 ปีที่แล้ว +1

      No actually he meant to say that the incident ray itself does not fall beyond the critical angle. If it did, then there would not have been any refraction.
      And since r is equal, the base angles of that triangle are also equal so the second refracted ray does not go beyond the critical angle by the laws of geometry and hence no TIR happens.

    • @priyanshukumarsingh8638
      @priyanshukumarsingh8638 3 ปีที่แล้ว

      @@black_crest sir, but many other books say that a rain drop is act alike Prism....so, by it is not of circular shape and two sides aren't equal.....so, it can be said n that TIR happens !! ???

    • @black_crest
      @black_crest 3 ปีที่แล้ว

      @@priyanshukumarsingh8638 Actually the rain drops are suspended in the air and are not under the force of gravity when a rainbow is formed.
      So it is assumed that the rain drops are spherical in shape
      Even if they were in shape of a prism, there is no saying that it is a PERFECT prism

  • @juijani4445
    @juijani4445 4 ปีที่แล้ว +28

    Respected sir,
    If we consider a stationary spherical water droplet air then your great explanation definitely holds true and I totally agree with you. But as we know that these tiny droplet move in the air but the rainbow seems to be stationary. Why? Is it because the droplets are constantly being replaced by other droplets? Also don't the droplets constantly keep changing their shape due to surface tension and the continuous changes in the atmosphere? Then shouldn't the rainbow be spread all over the place rather than having the shape it has?
    Thanking you
    A Science student

    • @nitinranacluster1737
      @nitinranacluster1737 4 ปีที่แล้ว +1

      Nice thought

    • @pinklady7184
      @pinklady7184 4 ปีที่แล้ว +3

      Rainbow always faces the opposite to the sun, while you stand on a straight path between the sun and rainbows. Here in Ireland, we get plenty of rain and thereafter lots of rainbows, depending on the strength of sunlight. We get not only single rainbows, also double rainbows, only sometimes. Triple rainbows are rare.

    • @shambho1171
      @shambho1171 4 ปีที่แล้ว +2

      Since the rain drops are very tiny, they should not change their spherical shape....I have seen that big liquid drop fragments into smaller one...but not small liquid drop

    • @stcks.rajeshsrivastava4096
      @stcks.rajeshsrivastava4096 4 ปีที่แล้ว

      ISC Physics - CE AMPLIFIER using NPN Transistor 🔥🔥 th-cam.com/video/9eMqZS9mYl0/w-d-xo.html 🔥🔥

    • @johnsonchakravarti8451
      @johnsonchakravarti8451 4 ปีที่แล้ว +1

      Bhai tere sawaal ka jabaab mere pass h

  • @harshil_1.618
    @harshil_1.618 4 ปีที่แล้ว +6

    How simply you explain, sir !!! 🙏😊👏👏👏

  • @riteshdas5107
    @riteshdas5107 3 ปีที่แล้ว

    Aek dam say concept badal gaya sir 🔥🔥🔥

  • @mausaminanda3611
    @mausaminanda3611 4 ปีที่แล้ว +8

    I am your big fan Sir.....

  • @subhransudey
    @subhransudey 4 ปีที่แล้ว

    sir your expansion is just excellent. very nice

  • @akritirao3721
    @akritirao3721 3 ปีที่แล้ว

    Sir...u r the best....your explanation is excellent

  • @dilsephysics4242
    @dilsephysics4242 8 หลายเดือนก่อน

    Thank u sir ,The God of physics ❤.

  • @pdmb9795
    @pdmb9795 4 หลายเดือนก่อน

    U r like my grandpa telling stories never fails to entertain in the class❤❤

  • @francesmadduri8958
    @francesmadduri8958 3 ปีที่แล้ว

    Really it's a 100%perfect answer sir

  • @rbkstudios2923
    @rbkstudios2923 4 ปีที่แล้ว +51

    SIR CAN YOU PLEASE DO A VIDEO ON
    *DOPPLER EFFECT BY PARTICLE (PHOTONS) THEORY*

    • @stcks.rajeshsrivastava4096
      @stcks.rajeshsrivastava4096 4 ปีที่แล้ว

      ISC Physics - CE AMPLIFIER using NPN Transistor 🔥🔥 th-cam.com/video/9eMqZS9mYl0/w-d-xo.html 🔥🔥

    • @bholanathkuanr2767
      @bholanathkuanr2767 4 ปีที่แล้ว +2

      I also need this.

  • @anjubaruah7406
    @anjubaruah7406 4 ปีที่แล้ว +1

    sir your explanation is very good

  • @n00h_raza
    @n00h_raza 4 หลายเดือนก่อน +2

    Finally I can oppose my teacher for this topic 😅

  • @VikashKrSharma111
    @VikashKrSharma111 4 ปีที่แล้ว +4

    yes sir same thing is written in ncert
    ncert says it is internal reflection.

    • @ano4980
      @ano4980 9 หลายเดือนก่อน

      So internal reflection hai na?

  • @gnanajebaraj9099
    @gnanajebaraj9099 3 ปีที่แล้ว +6

    Dear sir, further increasing in Angle of Incidence (i) in water droplet (let us say i1), causes also the increase in the Angle of Refraction (r1) until r1 reaches 90°. At that point i1 is equal to Critical Angle(i1=ic). Beyond that limit when we increase the i1 further, refraction gets stopped(Because in denser medium refracted ray can't bend away from normal!) So it is bouncing back. Hence only TIR occurs! What you said is when i1 value is less than ic! Just draw and check while you increase i1 beyond ic. 🙂 pardon me if I'm wrong.. Thank you..

    • @shlokdhoot8852
      @shlokdhoot8852 2 ปีที่แล้ว

      you are absolutely right!

    • @puskarkumar7954
      @puskarkumar7954 ปีที่แล้ว

      For tir light should travel from dener to rarer

  • @Velinthunai
    @Velinthunai 4 ปีที่แล้ว +5

    I have great respect for you Sir. I would like to see ur explanation in English for all the topics in physics. It would help studentswho didn't know Hindi. All your efforts help students.👍

  • @AKASHVERMA-ow1wm
    @AKASHVERMA-ow1wm 2 ปีที่แล้ว +1

    Aap kya padhate kaash main mil kr bta skta maza aa gya

  • @dhruw9935
    @dhruw9935 3 ปีที่แล้ว +2

    I believe there is partial internal reflection and not total.

    • @rohansrivastava3295
      @rohansrivastava3295 3 ปีที่แล้ว

      There is no Concept of partial internal reflection. There is just total internal reflection and reflection

  • @ravikumar_2serve_learners
    @ravikumar_2serve_learners 4 ปีที่แล้ว +6

    Sir, but in your book concepts of Physics, you write.. total internal reflection takes place in the formation of rainbow.
    Pg. no 440, 20.8
    Vol.1
    Concepts of Physics

    • @IITJEEGAMING
      @IITJEEGAMING 4 ปีที่แล้ว +1

      It says only internal Reflection no total

  • @kshitizsingh1384
    @kshitizsingh1384 4 ปีที่แล้ว +9

    Sir please make a video on Doppler effect for light waves

  • @Ayushgupta2004
    @Ayushgupta2004 4 ปีที่แล้ว

    Now all doubt is clear. Thanks a lot sir jee.

  • @iamhrz
    @iamhrz 4 ปีที่แล้ว +1

    Wow sir , what a logical explanation

  • @rajendrapatel4928
    @rajendrapatel4928 4 ปีที่แล้ว

    Wow sir!!
    Your explanation is so easy to understand. Great sir..

  • @manankate-23-ix-d79
    @manankate-23-ix-d79 2 ปีที่แล้ว

    Thank u sir from the bottom of my heart

  • @PHYSICSPOINT2019
    @PHYSICSPOINT2019 4 ปีที่แล้ว

    Menz evry book giving wrong information about Rainbow formation......Thnku sr it ws a nyc explaination.u hv kpt no doubt.evrythng is in black n white

  • @yogastreching7594
    @yogastreching7594 4 ปีที่แล้ว +9

    Sir concept of physics part2 in Hindi version

  • @yashgupta322
    @yashgupta322 3 ปีที่แล้ว

    Thank you so much sir
    Absolutely point to point explanation

  • @gauravjain111160
    @gauravjain111160 10 หลายเดือนก่อน +2

    Sir please clear my doubt that if the angle r2 is less than critical angle then why light is internaly reflected inside the water drop?

    • @krishnans7787
      @krishnans7787 6 หลายเดือนก่อน +1

      Yes that's what i too thought of asking. Some sort of confusion there.

  • @sheenubhatia8418
    @sheenubhatia8418 3 ปีที่แล้ว +2

    Which of the following phenomena of light are involved in the formation of a
    rainbow?
    (a) Reflection, refraction and dispersion
    (b) Refraction, dispersion and total internal reflection
    (c) Refraction, dispersion and internal reflection
    (d) Dispersion, scattering and total internal reflection
    Sir if this question comes in exam
    Then which option should be tick by students please tell

    • @devbhoomihimachaldevbhoomi8240
      @devbhoomihimachaldevbhoomi8240 3 ปีที่แล้ว

      I am also confused

    • @rohansrivastava3295
      @rohansrivastava3295 3 ปีที่แล้ว

      Option c will be correct

    • @shortube5871
      @shortube5871 3 ปีที่แล้ว

      @@rohansrivastava3295 nope B
      My mam told
      But I'm too confused

    • @rohansrivastava3295
      @rohansrivastava3295 3 ปีที่แล้ว

      @@shortube5871 Here me out, ask her again. If she still tells you the answer is B, try to quit your school(Since your teacher doesn't know how amazing science is, and she is just teaching you things which are false in the world o science). If not possible , do your own study from books. It is way more fun to study from the books you have purchased on your own than to study course books. I have studied a lot of books and also form some of the best teachers of India, and they too, will agree with me that the answer is C.

    • @shortube5871
      @shortube5871 3 ปีที่แล้ว

      @@rohansrivastava3295 woah...i gota take my tc then😂...im in 10 so i can't in between but yeah.. Tnkss

  • @abhinavraj9217
    @abhinavraj9217 4 ปีที่แล้ว +3

    how hard you wrote your books sir?....too tough but great

  • @sandeepsaxena4919
    @sandeepsaxena4919 4 ปีที่แล้ว +1

    Respected sir, water drop is not always spherical. So in that case TIR may take place as the two angles will not be same.

    • @nitinsharma7622
      @nitinsharma7622 4 ปีที่แล้ว

      Yes sandeep I think you are right

    • @11THFORM
      @11THFORM 3 ปีที่แล้ว

      Ya it may possible

  • @Adarshkumar-bb7cc
    @Adarshkumar-bb7cc 3 ปีที่แล้ว +1

    Is there is any absorption of light also

  • @revathi7636
    @revathi7636 11 หลายเดือนก่อน

    Thank you so much sir ,it was crystal clear.

  • @aadibiswas4245
    @aadibiswas4245 4 ปีที่แล้ว +1

    Very logical explanation 👌

  • @narutoworld4k
    @narutoworld4k 4 ปีที่แล้ว

    Yrr.. Yeh toh kamal ka h ❤💕

  • @jaswanikumar3006
    @jaswanikumar3006 3 ปีที่แล้ว +5

    Sir, my question is that what will happen if a ray will pass through a sphere made up of transparent glass by just touching it at only one point , that is, the ray is tangent to the sphere.
    PLEASE ANSWER.

    • @shivanshjha938
      @shivanshjha938 3 ปีที่แล้ว

      see the possible case is that it wont refract if it is tangent to the circle coz it wont penetrate the sphere though it makes an angle with normal that is 90 degree but still it is out of sphere

  • @allclasses-arundutt6618
    @allclasses-arundutt6618 3 ปีที่แล้ว

    Sir your explain always amazing

  • @alinasmaverickworld1094
    @alinasmaverickworld1094 4 ปีที่แล้ว +1

    Excellent explanation.

  • @बिपिनजीजायसवाल
    @बिपिनजीजायसवाल 3 ปีที่แล้ว +1

    So Interesting topics

  • @abharani7283
    @abharani7283 4 ปีที่แล้ว +1

    Excellent explaination 🤗

  • @aimap_07
    @aimap_07 4 ปีที่แล้ว +1

    the explanation was just awsm

  • @classroom3223
    @classroom3223 4 หลายเดือนก่อน +1

    angle less than critical agle for air water interface can be more than critical angle for water air interface.
    🤔

  • @desihacker3354
    @desihacker3354 4 ปีที่แล้ว +1

    nice explanation sir

  • @motivationalshorts1026
    @motivationalshorts1026 3 ปีที่แล้ว +4

    Sir when light enters in spherical drop then it is refracting but when it comes at another side then why it reflect? because surface is same during entering time and at reflecting time.....

    • @rahilvahora165
      @rahilvahora165 3 ปีที่แล้ว

      No because incident angle is great than 90 ° so it reflects

    • @Earnjivika
      @Earnjivika 2 ปีที่แล้ว

      @@rahilvahora165 if it's is more than 90 means it's a TIR

  • @aswathikrishnan5720
    @aswathikrishnan5720 3 หลายเดือนก่อน

    Hello sir, I would like to clarify my doubts. As you said, in the waterdrop, the phenomena occur is reflection, not TIR. As per my knowledge, for TIR to occur, the ray should travel from denser to rarer and

  • @maulikmehta3880
    @maulikmehta3880 3 หลายเดือนก่อน

    Great explanation...

  • @amanvishwakarma7792
    @amanvishwakarma7792 4 ปีที่แล้ว +1

    Sir you are really great

  • @pinklady7184
    @pinklady7184 4 ปีที่แล้ว +29

    Give us Irish your Indian sun for few days every week, and we give you plenty of rains and rainbows. Fair trade?
    Here in Ireland, you see not only single rainbows, sometimes double rainbows.

    • @snehshah4973
      @snehshah4973 4 ปีที่แล้ว +4

      Well, the trade's upto the nature..... Can't do anything.....

    • @chandanbanakar333
      @chandanbanakar333 4 ปีที่แล้ว

      Done.

    • @stcks.rajeshsrivastava4096
      @stcks.rajeshsrivastava4096 4 ปีที่แล้ว

      ISC Physics - CE AMPLIFIER using NPN Transistor 🔥🔥 th-cam.com/video/9eMqZS9mYl0/w-d-xo.html 🔥🔥

    • @rakesh_sahu_rk
      @rakesh_sahu_rk 4 ปีที่แล้ว

      We must see nth order rainbow

    • @adityasingh1423
      @adityasingh1423 4 ปีที่แล้ว

      You are free to take sun. We will gift it to you without asking anything in return from you.

  • @silentcolt4780
    @silentcolt4780 4 ปีที่แล้ว +1

    My favorite physicians
    #1:HC Verma Sir
    #2:Walter Lewin Sir
    #3: and the best Alakh Pandey Sir

    • @sayakbiswas3941
      @sayakbiswas3941 4 ปีที่แล้ว

      How can you even compare Alakh pandey with HC Verma or Walter Lewin..Are you crazy my boy..

  • @jaishsajad
    @jaishsajad 4 ปีที่แล้ว

    Sir r can be greater than critical angle because the TIR depends on media too.light must be going from denser to rarer medium.so there is TIR

  • @shashankbhat227
    @shashankbhat227 4 หลายเดือนก่อน

    Thank u very much sir
    Helped a lot

  • @thefrustratedscientist
    @thefrustratedscientist 3 หลายเดือนก่อน

    When water droplets fall down, it is not complete spherical, so that 2 "r" you have used, it is not necessary to be equal. To be more precise to say, it can be TIR or not as well..!!

  • @sandipanbanerjee2180
    @sandipanbanerjee2180 3 ปีที่แล้ว

    Wonderful explain sir

  • @anustupsengupta4335
    @anustupsengupta4335 4 ปีที่แล้ว

    Excellent explanation sir. Thanks a lot.

  • @RekhaSharma-qh3nn
    @RekhaSharma-qh3nn 4 ปีที่แล้ว +6

    Sir, Can total internal refraction take place when light is going from optically rarer medium to optically denser medium?

  • @motivator2.0king
    @motivator2.0king 2 ปีที่แล้ว +1

    Sir why sometimes two rainbow from?

  • @kumarclassesbykeshavsir8742
    @kumarclassesbykeshavsir8742 3 หลายเดือนก่อน

    Great sir
    Sir internal reflection aur total internal reflection me kya difference hai

  • @satyamthakur11a28
    @satyamthakur11a28 3 ปีที่แล้ว +1

    is it a robotic camera,
    which sir is using???????????

  • @harshvardhankumar5641
    @harshvardhankumar5641 3 ปีที่แล้ว

    Sir your video is awesome....

  • @pratibhashukla7213
    @pratibhashukla7213 3 ปีที่แล้ว +1

    Sir , why when ray of light goes inside the droplet then REFRACTION is take place and after that how droplet reflect ray of light 🤔🤔🤔🤔

  • @theb4stguy332
    @theb4stguy332 4 ปีที่แล้ว +1

    But the rain drop is not perfectly spherical therefore will the concept not change in real life?

  • @jassyrathore8394
    @jassyrathore8394 4 ปีที่แล้ว +1

    sir please .. gravity and speed me relation smja dijiye plz sir ..speed ko effect kr skti h ki nhi gravity ..

  • @nainsiharsh8447
    @nainsiharsh8447 4 ปีที่แล้ว +7

    Sir I purchase you book in class 10 and in this book you write
    internal reflection not total internal reflection.

    • @adruvitpandit5816
      @adruvitpandit5816 4 ปีที่แล้ว +3

      10th WOW, i studied it first when i started preparing of JEE in 11th, Newtonian mechanics and Advanced physics starts in 10th these days?

    • @tavishbhardwaj2819
      @tavishbhardwaj2819 4 ปีที่แล้ว +2

      @@adruvitpandit5816 in 10th book foundation for iitjee this is there in the chapter light reflection and refraction class 10

    • @adruvitpandit5816
      @adruvitpandit5816 4 ปีที่แล้ว +3

      @@tavishbhardwaj2819 Ohh i am amazed there are foundation courses starting from 10th itself these days. I passed long time back.

    • @muditsharma4125
      @muditsharma4125 4 ปีที่แล้ว +1

      @@adruvitpandit5816 bro many students complete hcv in 9th only those who are preparing for nsejs ..I myself has completed hcv , cengage and irodov in this lockdown period

  • @shashwatanand5169
    @shashwatanand5169 4 ปีที่แล้ว +1

    Thank you sir. Learnt a new concept today!!

  • @v.g.creations6489
    @v.g.creations6489 4 ปีที่แล้ว +10

    Hello sir , myself Omkar ,I'm now studying in 10th.
    I have the question about how to denote the refractive index .
    In different textbooks there are different suggestions .
    # In SSC textbook that is given like these:
    *The refractive index of medium 2 with respect to the medium 1.
    The given ratio for it is : 2n1= V1/V2
    # In CBSE textbook that is given like these:
    * The refractive index of medium 2 with respect to the medium 1.
    The given ratio for it is : 1n2=V1/V2.
    Here , 2n1 and 1n2 ....
    Please give me your suggestion .

    • @suspendedtheone2174
      @suspendedtheone2174 4 ปีที่แล้ว +4

      Refractive index is denoted by n or mew(the symbol for micrometre)
      Let's use n for now
      First of all we have to agree
      If refractive index of medium is more, in comparison to other medium, it means that light will travel slower in that
      So
      n 1(proportionality symbol) 1/V1
      n1 - refractive index of medium 1
      V1 - speed of light in medium 1
      Now there is a medium 2
      n2 - refractive index of medium 2
      V2 -speed of light in medium 2
      Refractive index of medium 1 with respect to medium 2 is written as
      2n1
      n1 - right side for the medium you are comparing
      Left side number, for medium you are comparing with
      Now speed of light thing
      2n1 = V2/V1
      That's it
      Hope it helps

    • @suspendedtheone2174
      @suspendedtheone2174 3 ปีที่แล้ว +1

      @@cynide5911 please check your ans
      N is refractive index
      2n1 means
      Refractive index of 1st medium with respect to second medium
      2n1 = n1/n2
      V1 is velocity of light in first medium
      V2 is velocity of light in second
      medium
      n1 = 1/V1
      n2 = 1/V2
      Because more the speed of light, less is the refractive index
      n1/n2 = 1 /V1 divided by 1/V2
      So
      It finally becomes
      V2 /V1

    • @benYaakov
      @benYaakov 3 ปีที่แล้ว +1

      Both the notations are correct . You can use any of these , believe me

  • @RonakguptaRolnoClassA
    @RonakguptaRolnoClassA 4 ปีที่แล้ว +4

    Sir in many textbook it is written that it is tir and even teacher tell us that it is tir in rainbow but if its write in paper that it is not tir is they will cut my marks??

  • @knowledgefactory7780
    @knowledgefactory7780 2 ปีที่แล้ว +9

    Dear Sir, possibly I'm wrong but the raindrops which fall on the earth are not in spherical shape as you take it in the diagram so angle of refraction on the second surface is greater than critical angle due to which TIR will possible.(means according to your diagram TIR is not possible but according to the physical nature of raindrops TIR is possible.) Waiting for your reply sir 🙏

    • @RaviraushanD
      @RaviraushanD 2 ปีที่แล้ว +1

      Keep waiting

    • @kripasajo
      @kripasajo 2 ปีที่แล้ว

      That's what I was thinking too.
      Realistically no raindrops are perfect spheres .

    • @shashanktripathi4140
      @shashanktripathi4140 2 ปีที่แล้ว

      Esa hi kuch main soch raha tha

    • @GamerShreyasYT
      @GamerShreyasYT ปีที่แล้ว

      Sir had just given the example of rain drop by taking its shape as circular but in reality there is no such fixed shape of a rain drop but the concept that has been explained by sir is absolutely correct as because if the medium is even little bit transparent (translucent) then some amount of incident ray refracts and some gets reflected back. If any one of these conditions are blocked then it breaks the laws of physics.

  • @swnsar
    @swnsar 4 ปีที่แล้ว +2

    Why circle? Why does the shape of rainbow circle?

  • @dilbagsingh9582
    @dilbagsingh9582 4 ปีที่แล้ว

    Very nice information Sir ji

  • @ilovepainting3311
    @ilovepainting3311 3 ปีที่แล้ว

    I think that is the reason why secondary rainbow is fainter than primary rainbow.......at every inside reflection there is some transmission ie refraction and hence loss of "light content" . Had it been total internal refraction then there would not be losses at every step of internal reflection and both primary and secondary rainbows would have been equally brighter.

  • @jaishreeram108pawanputra
    @jaishreeram108pawanputra 3 ปีที่แล้ว

    Thank you sir for clear my confusion

  • @ritugrewal1643
    @ritugrewal1643 4 ปีที่แล้ว +1

    Sir I have querry in this topic , That ... After light enters into , dencer medium why the light not completely passed through drop , why it bends bck and travel in dancer to dancer medium ??? and iff it is bck then how we says that in every drop of watr light travels with same process with same angle ???? , and ifff there is difference in paths follow by light in different drip is different then , why rainbow appears , why the rainbow see at a place ????

    • @somnathsahachowdhury8156
      @somnathsahachowdhury8156 4 ปีที่แล้ว +1

      For Reflection it"s back.
      But I have the same question like your's "if it is back then how we says that in every drop of water light travels with same process with same angle ???? , and if there is difference in paths follow by light in different drop is different then , why rainbow appears , why the rainbow see at a place ????"
      Is it not should be mixed of VIBGYOR ???

    • @somnathsahachowdhury8156
      @somnathsahachowdhury8156 4 ปีที่แล้ว +1

      When we understand rainbow we consider 1 water drop , but their is a million million of water drop.

  • @saritasingh4553
    @saritasingh4553 2 ปีที่แล้ว +1

    Respected sir I think that rain drops are not exact spheres so we cant make that angle r
    So there would be angle not equal to r or less critical angle but more than that which will be responsible for TIR

    • @swiftboo8120
      @swiftboo8120 ปีที่แล้ว

      Not exact but they're almost spherical so the phenomenon is roughly governed by the laws of reflection and refraction for spherical surfaces

  • @parveenlata1399
    @parveenlata1399 4 ปีที่แล้ว +1

    Sir
    Inside the droplet (where reflection of light rays occur on boundary of circle) the angle of refraction (which you said that it is less than critical angle) is the part of the angle of reflection, then how we can say that total angle will aslo be less than critical angle?.
    But your explanation was Easy.

    • @pankajkumarjha4022
      @pankajkumarjha4022 3 ปีที่แล้ว

      For the angle of incidence r at the boundary of droplets angle of refraction will be i as the light has entered with angle of incidence i. So no TIR takes place.

  • @ankityadav-sr5qd
    @ankityadav-sr5qd 4 ปีที่แล้ว +1

    Dear H. C. Verma sir.
    Aapki Bhautiki ki samajh part 2 kb available hogi...
    Pls reply

  • @VAIREN-os5wz
    @VAIREN-os5wz 2 หลายเดือนก่อน

    Best explanation

  • @amlesh-kumar45
    @amlesh-kumar45 2 ปีที่แล้ว +5

    Even ncert has mentioned that angle r should be greater than critical angle in class 12 th physics part 2 page no 333 in the section of "the rainbow" 🌈

  • @mananpathak7868
    @mananpathak7868 3 ปีที่แล้ว +1

    To sirji kya likhe exam me???

  • @yogitajangir9414
    @yogitajangir9414 4 ปีที่แล้ว +1

    Sir,we mostly see one rainbow in sky,
    In which conditions two rainbow appear in sky?? (Sir agar hum 10 baar rainbow dekha hi to kewal 2 ya 3 baar hi asa hota hai ki hume primary or secondary dono rainbow dikhayi de, most probably hume ek hi rainbow dikhayi deta hai why???)Sir please clear this doubt.