Light - Reflection & Refraction 07 | Refractive Index | Power of Lens | Combination of Lenses

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  • Опубліковано 21 вер 2024

КОМЕНТАРІ • 2,2 тис.

  • @anusree8133
    @anusree8133 5 місяців тому +337

    Anybody board in 2024-25

  • @shubhanshusrivastav8189
    @shubhanshusrivastav8189 3 роки тому +838

    He is the most demanded teacher of PW...for class 10 students

  • @anshsharma45
    @anshsharma45 3 роки тому +873

    i have never ever seen a physics teacher like u in my whole life. u r legend sir and thank u so much sir for being a good explainer and giving us free education thanks a lot.

    • @mdsahjadhussaintyreenginee4360
      @mdsahjadhussaintyreenginee4360 3 роки тому +14

      Right free education ... It's good

    • @vikash__9753
      @vikash__9753 3 роки тому +25

      Physics wallah ,Alakh pandey sir is best in the world

    • @cricketerlover4887
      @cricketerlover4887 2 роки тому +4

      Yup

    • @VirtualVixensgaming
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    • @shubhsingh4265
      @shubhsingh4265 2 роки тому +9

      Then so and see abhishek sir of Vedantu he is much better than him and his classes are interesting and comedian and more understanding

  • @sajedasadia5960
    @sajedasadia5960 2 роки тому +282

    Today I have got my physics mid term result,I have got the highest and it’s credit goes to you,,,,, thanks Rakshak sir,,,, from Bangladesh 😊🙂

    • @sandhyadixit9029
      @sandhyadixit9029 Рік тому +16

      does In Bangladesh also board exams take place? No offence, Just asking

    • @crazygamerz993
      @crazygamerz993 Рік тому +16

      @@sandhyadixit9029 google krle

    • @BusyMax66
      @BusyMax66 Рік тому +4

      ​@@crazygamerz993 🗿

    • @Cocwithraj
      @Cocwithraj Рік тому +4

      Bhai Bangladesh me Hindi v ha kya????

    • @blueterminator1727
      @blueterminator1727 Рік тому +4

      ​@@Cocwithrajalmost everyone in indian subcontinent can speak hindi, incl. Bangladeshis, pakistanis, nepalis, etc

  • @brrr_22
    @brrr_22 Рік тому +18

    close to tears right now
    i was so scared of this chapter, because a tuition teacher taught me this chapter in such a way that I hated physics. he skipped the basics, scolded me for not getting it at one go and always picked at how I wont pass 10th at my pace.
    but pw, explained it so simply, and so beautifully that I'm proud of myself for finishing this chapter. and it wasn't that hard either. hats off to you this foundation. saving lives.

  • @anshraj3446
    @anshraj3446 Рік тому +20

    57:05
    n = c/v
    v = c/n
    There fore,
    speed of light in :
    A = c/1.33
    B = c/1.50
    C = c/1.52
    D = c/2.40
    It shows that the speed of light in medium A is maximum and in medium D is minimum.
    So, when light travels from any of these mediums to medium A, speed will be maximum
    and when light travels from any of these mediums to medium D, speed will be minimum

    • @Denji_Sama_1825
      @Denji_Sama_1825 5 місяців тому +2

      you explain the ans..very clearly..😇

    • @assassin4737
      @assassin4737 3 місяці тому +1

      the question is asking about CHANGE IN VELOCITY not ABSOLUTE VELOCITY.

    • @MannuPant-zq9gw
      @MannuPant-zq9gw 10 годин тому

      @@assassin4737 acchiya... 😅😄

  • @jagritigupta8281
    @jagritigupta8281 3 роки тому +81

    50:11 :- speed of light in glass is 2×10^8 m/s.

    • @sakshikushwaha4663
      @sakshikushwaha4663 2 роки тому +3

      ye m/s kaise hoga ye to unit less quantity h na???

    • @aasthagianchandani1154
      @aasthagianchandani1154 2 роки тому +6

      @@sakshikushwaha4663 unitless quantity refractive index hoti hai, yahan humne speed of light dhundha hai

    • @pransu1579
      @pransu1579 Рік тому +1

      @@sakshikushwaha4663 speed of light puchi gayi hai, unitless quantity refractive index hota hai

    • @immortal9063
      @immortal9063 Рік тому +2

      @@sakshikushwaha4663 wo photons unit less hai aur tb jb wo rest mai ho tb hi otherwise they carry momentum(planck's theory)

    • @sakshikushwaha4663
      @sakshikushwaha4663 Рік тому +1

      @Prachi Mishra more bigger than you😏😏

  • @justkunzy
    @justkunzy 3 роки тому +68

    Homework Question:
    (i) Change in the speed of light will be minimum when the change in refractive index will be minimum..
    Therefore, when travel from B to C or C to B it will experience minimum change in its speed due to minimum change in refractive indices of the mediums.
    (ii) Change in the speed of light will be maximum when the change in refractive index will be maximum..
    Therefore, when travel from A to D or D to A it will experience maximum change in its speed due to maximum change in refractive indices of the mediums.
    Majaa aagya sirji !!!😁

    • @manassaxena5386
      @manassaxena5386 3 роки тому +19

      Right bro me bhi yahi soch raha tha but i think sir ne question galat padh liya...wo speed of light ko maximum ya minimum soch rahe the but question me "change in speed of light" pucha hai....but glad to see ki tumne bhi sahi answer diya hai... goodluck 👍

    • @mahakal772
      @mahakal772 3 роки тому +4

      Bro your ans is wrong. Watch the hint once. As when the change in 'n' is minimum the light will travel fast.

    • @HinduPhoenix
      @HinduPhoenix 3 роки тому +1

      Galat hai bhai tumahara

    • @HinduPhoenix
      @HinduPhoenix 3 роки тому

      @@mahakal772 yup 👍

    • @jadugarrrrrr...
      @jadugarrrrrr... 2 роки тому +1

      Bilkul bhai

  • @eduenigma0
    @eduenigma0 2 роки тому +35

    I was very scared about this topic but when i saw your explanation that gave me a huge knowledge and everything was understood by you.. thanks sir

  • @MarsDeshmukh
    @MarsDeshmukh 2 роки тому +72

    I never knew that physics was an interesting subject. All I needed was a great teacher like you, sir. Thank you for your teaching🙏

  • @Sharmakiran.
    @Sharmakiran. 2 роки тому +28

    Sir I can't thank u enough for raising such a great teaching of physics with us
    Really nobody can teach physics like u .......thankuuuuuu🙏

  • @AnkitSharma-bx7bc
    @AnkitSharma-bx7bc 2 роки тому +34

    the best physics teacher ever found. I don't know why my school can not have a teacher like this although my school is very good but then also after completing the chapter from the school i have to again do it at home.

    • @eeevara
      @eeevara 2 роки тому +1

      ig it's the case with most of us coz the teachers really get irritated in schools if we ask them a question more than twice🥲

    • @sonsoni2440
      @sonsoni2440 2 роки тому

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    • @AFB1234
      @AFB1234 3 місяці тому

      Your right, teachers have preasure to finish syllabus, so they dont explain it too well, or make the topic clear.

  • @doggyzvlogs302
    @doggyzvlogs302 3 роки тому +9

    56:40 to 56:50 sir khatarnak acting

  • @madhudubey9705
    @madhudubey9705 5 місяців тому +4

    56:10
    1case: D =2.40 the speed of the light will be minimum.
    2case: A =1.33 the speed of light will be maximum.

    • @assassin4737
      @assassin4737 3 місяці тому

      the question is asking about CHANGE IN VELOCITY not ABSOLUTE VELOCITY.

  • @sarojrani8267
    @sarojrani8267 2 роки тому +166

    Oke the only teacher who made me develop crazy interest in physics 😌 now it's not at all boring for me

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    @chandrakantchoudhary193 3 роки тому +29

    You are best teacher of physics in youtube

  • @AnshuKumar-mt4go
    @AnshuKumar-mt4go 3 роки тому +109

    1) 2*100000000 m/s
    2) 1.66
    4) a medium is maximum, d medium is minimum

  • @ashwin889
    @ashwin889 3 роки тому +83

    38:33 how cutely sir said mohan...☺️

  • @anjalirawat9914
    @anjalirawat9914 Рік тому +20

    velocity of speed in medium is inversely proportional to the refractive index
    therefore, velocity will be maximum in the first case{ a} and will be minimum in the last case{d}

    • @assassin4737
      @assassin4737 3 місяці тому +1

      the question is asking about CHANGE IN VELOCITY not ABSOLUTE VELOCITY.

  • @pransu1579
    @pransu1579 Рік тому +16

    50:10
    The speed of light in glass is 2×10⁸ m/s

  • @anuverma23498
    @anuverma23498 3 роки тому +24

    Thank you sir 🙏🙏

  • @vibhasingh7892
    @vibhasingh7892 3 роки тому +23

    Best channel and best teacher with a very detailed vdo.... I got to learn more than the ncert text book.... I recently started studying on this channel.... It's too helpful.... Thank you so much to all the teachers here...❣️

  • @dadhichmishra3684
    @dadhichmishra3684 3 роки тому +47

    55:42
    Answer:- Speed of light is minimum in (A)
    Maximum in D
    Because As we know that,Refractive index is inversely proportional to the speed of light.Hence if refractive index is more then change in speed of light is maximum and if the refractive index is less then change in speed of light is minimum....

    • @titlistgaming4480
      @titlistgaming4480 3 роки тому +24

      Bro jitna Jada refractive index utni kam speed of light Phir to (A) Me sabse Jada speed hogi(Maximum)
      Apne A me minimum likha h By mistake

    • @padmashukla2999
      @padmashukla2999 3 роки тому

      @@titlistgaming4480 bhai question accha se padh in which case the change speed will be minimum and maximum

    • @rafatrasheed5366
      @rafatrasheed5366 3 роки тому +1

      The word "change in" created all the confusion 😅. Anyways thanks for correcting each other.

    • @ayushmanmishra6782
      @ayushmanmishra6782 3 роки тому +1

      @@titlistgaming4480 sahi h bhai tuu

    • @sonofsharmag6706
      @sonofsharmag6706 2 роки тому

      @@ayushmanmishra6782 bhai kya hoga iska answer🤔

  • @ananyaphukan1312
    @ananyaphukan1312 6 місяців тому +84

    Give attendance who will give board exam in 2025🎉

    • @jordargaming4724
      @jordargaming4724 4 місяці тому

      Me

    • @Shubham13319
      @Shubham13319 4 місяці тому +1

      Batch kon kharidta hai....Jab Rakshak Sir ka complete explanation wala video available ho....😂😂😂😂

    • @itz--anuj794
      @itz--anuj794 4 місяці тому

      Me

    • @munna-khan4565
      @munna-khan4565 4 місяці тому

      Tara diyan kidhar hai Tara bai idhar ha

    • @anishthakur7529
      @anishthakur7529 4 місяці тому

      Mind your own business 😏

  • @pujapoo2843
    @pujapoo2843 Рік тому +132

    Any one board exam 2023-24😊😊😊😊

  • @dhanushsinghdhanushsingh6616
    @dhanushsinghdhanushsingh6616 3 роки тому +32

    The way he teaches very deeply I adore this!!🤞🤞🤞🤞and Rakshak Sir MOP MAHA OVER POWERED!!!!😎😎😎😎

    • @CryptoBoyKrishna
      @CryptoBoyKrishna 3 роки тому +1

      Kya time pass wala comment karte ho.
      Jitna time type karne me lagaya utna me kuch padh leta.....

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      @mine_own_gaming785 2 роки тому +1

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      Ab mere ko gyan mat dene lagna....🙂🙃

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      @zomatoorder8691 2 роки тому

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  • @youtubeDivyansh
    @youtubeDivyansh 9 місяців тому +6

    55:43 Answer. (i) Minimum change is seen as light moves between 1.50 and 1.52, i.e. B and C. (ii) Maximum change when light moves between 1.33 and 2.40, i.e. A and D.

    • @yashikaks111
      @yashikaks111 8 місяців тому +3

      Hmm ye to samajh aagya but exact koi ek answer nikalne ka koi tareeka hai??

    • @youtubeDivyansh
      @youtubeDivyansh 8 місяців тому +2

      @@yashikaks111 sab moha Maya ha
      Is eak question ka multiple answer da raha ha Google alag alag web site pa
      So ....idk 😐
      I don't know why I am writing this shit
      By

  • @rechaldua9329
    @rechaldua9329 Рік тому +5

    Pyqs q2
    Refractive index is 1.6 in that medium

  • @rimjhimgupta6300
    @rimjhimgupta6300 5 місяців тому +16

    Ans 4 of pyq- minimum velocity in medium D,maximum velocity in medium A

    • @assassin4737
      @assassin4737 3 місяці тому +1

      the question is asking about CHANGE IN VELOCITY not ABSOLUTE VELOCITY.

  • @chickenroaster1327
    @chickenroaster1327 Рік тому +6

    38:45 the best scene 😂

  • @Sagarcreation_
    @Sagarcreation_ 2 роки тому +96

    56:00
    A/D - minimum speed of light
    B/C - maximum speed of light

    • @ashachandra7356
      @ashachandra7356 2 роки тому +9

      They have not asked speed of light, instead they have asked minimum and maximum change in speed of light

    • @saurabhworks6757
      @saurabhworks6757 2 роки тому +7

      @@ashachandra7356 You are wrong abL and his answer is correct

    • @siddhantkamboj7767
      @siddhantkamboj7767 2 роки тому +12

      A to D
      Change will be maximum
      B to C
      Change will be minimum

    • @praveen_xy
      @praveen_xy Рік тому +1

      @@akashpatwa2639 woh toh puch h 😂

    • @shreyanchakraborty1877
      @shreyanchakraborty1877 Рік тому +1

      ​@@siddhantkamboj7767 wrong

  • @uzmachaudhary2725
    @uzmachaudhary2725 3 роки тому +71

    I have not found tuetion around my village.... But when I saw your videos ,, I understood each and every topic with the help of you .... Thank you so much ❤️💕

  • @min2da242
    @min2da242 3 роки тому +75

    One of my favourite you tube channel ❤️

  • @atulbanarasi
    @atulbanarasi Рік тому +13

    Wow! What a nice explanation sir you are the best teacher of physics

  • @sanjeevKaumarJha
    @sanjeevKaumarJha Рік тому +10

    Time:- 44:31
    Q2. Vm:- 2 × 10 to the power 8

    • @shubhhhh__
      @shubhhhh__ Рік тому +1

      Vg = 2×10 to the power 8

    • @Aetherakabane
      @Aetherakabane Рік тому +3

      Instead of writing '"to the power"' u can use this symbol denote it on internet "^"

  • @danishmushtaqdraboo5729
    @danishmushtaqdraboo5729 2 роки тому +12

    The way u teaches is really unique and awseome sir
    U cleared all concepts of light related to all the all 7 videos and from the depth my heart thanku so much.and i pray to GOD fr urself to keep olwys hppy to u

  • @skmishra1685
    @skmishra1685 3 роки тому +18

    Love ur teaching ❣️

  • @criticalgod9
    @criticalgod9 Рік тому +3

    50:19 The ans of Q1 IS Vg=2×10⁸

  • @arjeetmartha1655
    @arjeetmartha1655 Рік тому +6

    Too good sir,I am a parent clearing my doubts watching your video.Loved your lecture and the style of your teaching was awesome.

  • @indrapal6274
    @indrapal6274 2 роки тому +15

    Sir you are amazing so amazingly explain the topic before the lecture i couldn't get how to understand the difference between r.i and a.i thankyou so much 🙂🙂

  • @dhananjay321
    @dhananjay321 3 роки тому +37

    Sir jaldi syllabus complete kara dijeye please 🙏 😢

  • @kashmijaved2936
    @kashmijaved2936 3 роки тому +77

    THANKYOU SO SO MUCH FOR THIS SERIES YOU DON'T KNOW HOW MUCH THIS HELPED ME AHHH! YOU'RE THE BEST PLATFORM ON UA-cam YOU GUYYS DESERVE MILLIONS OF SUBSCRIBERS💞

  • @madhuwantichattopadhyay6040
    @madhuwantichattopadhyay6040 2 роки тому +27

    I really had a lot of fun learning this chapter. You are my favourite teacher sir. You have made all my insecurities in topics, my strength. A big thank you to you Rakshak sir

  • @poki2318
    @poki2318 Рік тому +10

    50:00 Vg= 2x10^8
    51:09 Nm=1.6

  • @vedipatel3268
    @vedipatel3268 Рік тому +12

    I didn't got to know you from the starting of this 10th session, that's sad coz then I would have definitely ace in physics, but it's ok that I got to know you sir in the last 3 months. So better late than never. I will definitely make my younger brother study from you from the starting so that he won't regret anything later 🙌
    Maybe you think that you are just teaching, but trust me you have changed the life of students like me whose physics base was not clear!!
    You are no less than Guru dron for me 🙏🏻

    • @officialvivekydv
      @officialvivekydv Рік тому

      Aaap abhi bhi yahi adh rahi apne session ke aa Gaye one shot me inhe sir ke😁

    • @girishmalviya4799
      @girishmalviya4799 Рік тому

      Guru dron hai to ungli bhi mange ka hak hai 😂😂😂😂

  • @studiouswicked4903
    @studiouswicked4903 2 роки тому +25

    1 - velocity of glass - 2*10^8 m/sec
    2 - refractive index of medium - 5/3 = 1.66
    3 - A medium maximum and D medium minimum becoz refractive index has inverse relation with velocity of medium..

    • @Dk-vz6sg
      @Dk-vz6sg 2 роки тому +1

      you should check you answer 2 .don't write unit of refractive index

    • @studiouswicked4903
      @studiouswicked4903 2 роки тому

      @@Dk-vz6sg thank you

    • @assassin4737
      @assassin4737 3 місяці тому

      the question is asking about CHANGE IN VELOCITY not ABSOLUTE VELOCITY.

    • @kumudsingh335
      @kumudsingh335 3 місяці тому

      ​@@assassin4737aisa hai toh aap hi explain krdo

  • @shrivedkaware3142
    @shrivedkaware3142 3 роки тому +110

    I was actually angry that Alakh sir didn't come but you are none less than him sir🙏 . You made those topics crystal clear, plus, your diagram skills are amazing 🔥🔥

  • @NainaShukla-nq6um
    @NainaShukla-nq6um 3 роки тому +10

    49:20
    Pyq qus 2
    Refractive index 1.66

  • @priyabratamukherjee375
    @priyabratamukherjee375 3 місяці тому +2

    Sir ji ap bohut acha padhate ho
    Bohot maja ata hai apke class mein
    Ap pura theory ko bohot interesting bana dete ho.
    Ap ke wajah se mujhe aj physics ke numericals karne mein koi dikkat nahi hoti hai.
    Ab Sare numericals easy lagte sirf aur sirf apke wajah se.
    Pehle mujhe ek bhi numericals nahi ati thi.
    Thank You Sir❤❤❤.

  • @sohanjaiswal8966
    @sohanjaiswal8966 5 місяців тому +7

    39:32 literally told my name

  • @anubhabdas5625
    @anubhabdas5625 2 роки тому +21

    Speed Of Light is minimum in Medium D
    Speed Of Light is maximum in Medium A

    • @swarup4967
      @swarup4967 Рік тому +2

      👍

    • @brajkhushi06
      @brajkhushi06 Рік тому +1

      It's wrong bro
      ...
      Question padhiye dhyan se
      Speed of light nhi change in speed of light....ke bare me question puchha gya hai

    • @shamevfx3357
      @shamevfx3357 Рік тому

      ​@@brajkhushi06 i think the answer is (i) A TO D AND (II) D TO A because they asked whether light travels from one medium to another^

    • @avnisingh5822
      @avnisingh5822 8 місяців тому

      ​@@shamevfx3357 yes you are right

  • @ragnikumari1868
    @ragnikumari1868 3 роки тому +16

    I'm very glad today because this topic is very confusing for me almost 3 months but after this session.I am confident in this topic..Thank You so much👍👍

  • @simranpatidar4531
    @simranpatidar4531 3 роки тому +17

    You are very great sir. I have not experienced the session like this one. I understand all the things which you explain.👍👍

    • @abhi-editzz
      @abhi-editzz 6 місяців тому +1

      I think you have praised more than needs😂😂

  • @SonaliYadav-im5cx
    @SonaliYadav-im5cx Рік тому +3

    Your are the best physics teacher I have seen in my 2 years journey with physics

  • @manasipatnaik-fp4xw
    @manasipatnaik-fp4xw 5 місяців тому +19

    Anyone board exam 2024-25 and chahate hei ki UA-cam mein jald live class start ho jaye

  • @utkarsh2972
    @utkarsh2972 3 роки тому +30

    Pyq ans 1 👉 speed of light in glass = 2 * 10 to the power 8 m\s

    • @jeevak9545
      @jeevak9545 5 місяців тому

      😂😂😂😂😂😂😂😂😅😢🤪

  • @palaktanwar1035
    @palaktanwar1035 2 роки тому +17

    PYQ answers -
    1 - 2 multiply 10 power 8
    2- 1.66
    3- 5/3
    4- maximum in D and minimum in A

  • @Sh_ine82
    @Sh_ine82 5 місяців тому +4

    Thanks sir ..... maine kabhi soncha nhy tha ki mjy light chap ka aik b numerical aayega .... but because of you ye possible ho paya ..... Thanks a lot ..... lots of love from kashmir

  • @RajarshiGhosh-h8g
    @RajarshiGhosh-h8g Рік тому +5

    Its really very appreciating that I finally found the most wanted teacher of Physics !!!!!!!!!!!!!!!!! At the same time I gained some confidence that I am gonna surely overcome my physics exam with wonderful results and its all for you sir . There's no word to praise your outstanding method of teaching . Heartiest thanks from the bottom of my heart .
    ~From WB , Calcutta ......

  • @vandanagupta5162
    @vandanagupta5162 11 місяців тому +8

    Answer of last question,
    Minimum - When light travels from A to D(since A and D has maximum difference in R.I.)
    Maximum - When light travels from B to C(since B and C has least difference in R.I.)

  • @jarvisai4546
    @jarvisai4546 2 роки тому +64

    Sir It was seriously unbelievable that my all doubts got cleared Sir I am extremely
    thankful for your efforts and the team as well. It is genuinely straight from the heart.
    Sir sach mai maza aa gya

  • @mrfakedetector7410
    @mrfakedetector7410 2 роки тому +5

    55.06 sir the minimum speed of light will be in medium d coz od r.i is 2.40
    And maximum in A 1.33

  • @hcker2498
    @hcker2498 3 роки тому +8

    55:08 you can solve this question more easily by the formula : n13 = n12 × n23

  • @PhysicsWonders-wj5qd
    @PhysicsWonders-wj5qd 8 місяців тому +1

    Change in speed will be minimum when light will travel from B to C or C to B as change in their refractive indices is minimum similarly change in speed will be maximum as light travels from D to A or A to D as change in their refractive indices is maximum (you can also think if light light goes from vaccum to air there will be negligible change in speed as change in their refractive indices is negligible)

  • @parthbajpai4915
    @parthbajpai4915 2 роки тому +2

    20:24 sir said right but there is one more thing is that
    if you add all power than you also find the power
    let us assume the total power of the lens is 20D
    P=1/F
    20=1/F
    F=1/20
    .05 meter(5 cm)

  • @pritimakumari9526
    @pritimakumari9526 3 роки тому +5

    Thank you sir... 💞💞💞

  • @shadanalam6092
    @shadanalam6092 2 роки тому +5

    Thank u so much sir and physics wala channel to provide a best lectures to this chapter and god bless u sir.

  • @Aspirant_blossom_228
    @Aspirant_blossom_228 3 роки тому +5

    Very-very thank you sir

  • @AnilYadav-zh2qm
    @AnilYadav-zh2qm 4 місяці тому +1

    Last ques ans~
    Change in speed will be max - from D to A
    Change in speed will be min - from C to B

  • @Pratibha1107
    @Pratibha1107 2 роки тому +4

    1) 2×10^8
    2) 1.66
    4) Minimum - Medium D
    Maximum - Medium A

    • @siddhi6763
      @siddhi6763 2 роки тому +3

      Yes

    • @Pratibha1107
      @Pratibha1107 2 роки тому +3

      Sir Please upload the video of chapter 3rd numericals

  • @ishrat-educationdisaster.1471
    @ishrat-educationdisaster.1471 Рік тому +31

    He just faded away my all confusions, you're legend sir ji... ✨❤🔥

  • @aryanstudy6735
    @aryanstudy6735 2 роки тому +3

    Maximum speed = A
    Minimum speed of light = D
    Because denser medium pending light more than less devser medium.
    Thanks for teaching 👌🙏

  • @sarithalohithgowda3086
    @sarithalohithgowda3086 Рік тому +5

    Sir you have made this topics as simple as possible.....thank you soo much sir for making this topic easy to understand 👍

  • @madhudubey9705
    @madhudubey9705 5 місяців тому +1

    51:00 2Q. the refractive index of the medium is 1.66

  • @Educationalmysteryprince
    @Educationalmysteryprince Рік тому +1

    Thanks sir 🎉

  • @aishwaryabhatnagar8641
    @aishwaryabhatnagar8641 3 роки тому +68

    Rakshak sir is real rakshak for our preboard exams🙏

    • @obanai____
      @obanai____ 3 роки тому +5

      Boards too

    • @facttubeearth8024
      @facttubeearth8024 3 роки тому +2

      Yaa. 😗😗😗

    • @kartikaghav7203
      @kartikaghav7203 3 роки тому +4

      As well as board

    • @satyammishra2613
      @satyammishra2613 3 роки тому +1

      not only for preboards but also for boards

    • @hcker2498
      @hcker2498 3 роки тому +1

      for a moment i thought that you are saying that this sir rakshak (arre jaise ravan tha) woh wala rakshak 😂😂

  • @deshpandesoham2007
    @deshpandesoham2007 3 роки тому +29

    Mohan is not harmed by this video 😂

  • @heyyatsssss_
    @heyyatsssss_ Рік тому +4

    Idk how this chapter is crystal clear to me rn !!!

  • @goalexpert3576
    @goalexpert3576 Рік тому +2

    56:26 sir change in speed hai . Not going fast or slow

  • @stefotsufurema13
    @stefotsufurema13 Рік тому +1

    56:01
    light will travel the fastest in medium A and slowest in medium D as velocity of light in a medium is indirectly prototional to the refractive index of that medium

  • @i.m__sneha7092
    @i.m__sneha7092 3 роки тому +92

    🥺❤️ hey I would really like to appreciate you for your teaching skills sir! I'm very thankful now all of my doubt's were clear from past 5 days I was a bit stressed as I'm not getting my concepts clear .

    • @mr_aiims
      @mr_aiims 3 роки тому +1

      Me too✌️❤️

    • @yashRajput9958.
      @yashRajput9958. 3 роки тому +1

      Anyone Insta user 🙂✋🏻?
      If yes then give your I'd name in reply 🙂

    • @AeStHeTiCzIkRa
      @AeStHeTiCzIkRa 2 роки тому

      @@yashRajput9958. bro give me your instagram I'd

    • @yashRajput9958.
      @yashRajput9958. 2 роки тому

      @Not Shubham toh rhn do phr😂

    • @chaitanya6713
      @chaitanya6713 2 роки тому

      @@yashRajput9958. yeah

  • @chahatchaudhary3743
    @chahatchaudhary3743 3 роки тому +5

    Ques-4 refractive index max in medium -A
    Minimum in medium-D

  • @BatmanGotham12
    @BatmanGotham12 Рік тому +2

    Speed of light will maximum in Medium with Less n which is medium A and minimum in medium which has High n which is medium D

  • @sameenatauqeer996
    @sameenatauqeer996 8 місяців тому +2

    Sir answer of Q1 is vg=2×10 to the power 8m/s

  • @intakhabalam3304
    @intakhabalam3304 Рік тому +3

    Wow what a amezing talent sir,
    I didn't see teacher like u....
    Intakhab from PAKISTAN

  • @GulshanKumar-wj3bs
    @GulshanKumar-wj3bs 2 роки тому +4

    55:51
    Maximum -when light travels from medium A to D
    Minimum- when light travels from medium
    B to C

  • @aarinsheik1583
    @aarinsheik1583 3 роки тому +9

    Thank you so much sir..!! Very useful..!! We are blessed to have u in physics wallah foundation..!! 😊

  • @volto6998
    @volto6998 Рік тому +1

    I want teacher just like you in my 🏫🎒 school and I wish everyone Will have teachers like you in their schools😊

  • @mahendrachourasia6785
    @mahendrachourasia6785 Рік тому +1

    Q1 = 2× 10^8
    Q2 = n= 1.66
    Hw question
    A/D = minimum
    B/C = maximum

  • @swayam3555
    @swayam3555 3 роки тому +13

    SIR YOU ARE THE ONE WHO HAVE THOUGHT THE TOUGHEST TOPIC WHICH IS REFRACTIVE INDEX IN A EASIER MANNER. THANK A LOT SIR 🙏🙏

    • @CryptoBoyKrishna
      @CryptoBoyKrishna 3 роки тому +2

      Kya time pass wala comment karte ho.
      Jitna time type karne me lagaya utna me kuch padh leta.....

    • @Tech_Gamers
      @Tech_Gamers 3 роки тому +3

      @@CryptoBoyKrishna aur English be dekho😂. RIP grammar

    • @santosh2858
      @santosh2858 3 роки тому +1

      @@Tech_Gamers shut ul guys 🙄do not make fun of anyone pls

    • @manas5139
      @manas5139 2 роки тому +1

      @@CryptoBoyKrishna tu kyu time paas kar raha hai iska comment padh ke aur reply karke jaa ke padh le thoda bete

    • @CryptoBoyKrishna
      @CryptoBoyKrishna 2 роки тому +1

      @@manas5139 Haha , Still you are here, haha.
      Why? Lol

  • @vanshdeepsingh6620
    @vanshdeepsingh6620 3 роки тому +6

    Thankyou so much sir, you made the concept very clear.🙏🙏

  • @414theConstant
    @414theConstant 2 роки тому +3

    51:09 answer 1.67.

  • @dhairya941
    @dhairya941 Рік тому +2

    HW:- IN c and d light is minimum because refractive index is more and in a and b light is faster because comparitively less refractive index

  • @saurav8272
    @saurav8272 Рік тому +1

    Minimum: 2.40
    Maximum: 1.33
    Refractive index is inversely propositional to velocity ok

  • @dheerajjangir7309
    @dheerajjangir7309 2 роки тому +7

    What if we take a combination of lens of power - 3D and a concave lens of power - 3D sir are they same or is there any differ..

  • @fuyukaa..0_0
    @fuyukaa..0_0 Рік тому +3

    Sir you are the best teacher of pw
    I'm a student of victory batch ICSE class 10 and this topic is in our syllabus and i couldn't understand it through our batch teacher I'm able to understand by you only...
    Thank you soo much sir ❤

  • @RiteshKumar-yc7kp
    @RiteshKumar-yc7kp 3 роки тому +8

    After watching your all video i finally understood everything in this chapter.
    You are great sir☺☺

  • @itz_priyu525
    @itz_priyu525 7 місяців тому +1

    56:11- 1) minimum - B TO C AND 2) maximum -A TO D

  • @Yoyo-xy7xv
    @Yoyo-xy7xv Рік тому +2

    50:04 -> Q1: 2×10^8

  • @lakshyakhokhar.
    @lakshyakhokhar. 2 роки тому +11

    😎 explanation. After hearing the new circulum in 2022 ...2023
    Halat of students are like = 😑🥶🤯