Derivation of Equivalent Focal Length of Combination of two lens separated by distance

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  • Опубликовано: 4 дек 2024

Комментарии • 60

  • @SatishKumar-bg5wp
    @SatishKumar-bg5wp 2 месяца назад

    Excellent

  • @mjosh8561
    @mjosh8561 Месяц назад

    Made so easy

  • @om-physicsnmvs
    @om-physicsnmvs Год назад +1

    Superb sir,thank you

    • @kamaldheeriya
      @kamaldheeriya  6 месяцев назад

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  • @priyanshgupta5713
    @priyanshgupta5713 2 года назад +2

    nice explanation my doubt are cleared thanks a lot

    • @kamaldheeriya
      @kamaldheeriya  2 года назад

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  • @bloodedmamba5660
    @bloodedmamba5660 Месяц назад

    ❤❤

  • @dr.muthukannum8719
    @dr.muthukannum8719 3 года назад +4

    Superb without deviation deviation is derived for both the cases. thanks a lot.

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +1

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  • @VivekKumar-yx5jj
    @VivekKumar-yx5jj Год назад +2

    But what will be the position of new lens with effectiv focal length

    • @architshripandey7229
      @architshripandey7229 11 месяцев назад +1

      It would be independent of the original setup

    • @architshripandey7229
      @architshripandey7229 11 месяцев назад

      It would be independent of the setup ig as the angle substended by the obj on the lens wrt principal axis would be same irrespective of where you keep the new lens from the object. Also see that if in q.. Distance is given wrt O1 lens.. Ig u can take it for the combined lens too.. As angle substended by the object doesnot depend on the height of the lens

    • @kamaldheeriya
      @kamaldheeriya  10 месяцев назад

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  • @aalim1282
    @aalim1282 3 года назад +1

    thank you sir

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +2

      Keep in touch there are more videos for u in channel playlist have a look, u can also use #kamaldheeriya in youtube search to access all videos of my channel

  • @abhishekdwivedi.physics
    @abhishekdwivedi.physics 9 месяцев назад

    Will it be applicable for all the cases? F1 and F2 will be placed with sign or not. In one case i find some difficulty with this formula.

    • @kamaldheeriya
      @kamaldheeriya  6 месяцев назад

      Use sign convection acc to lens

    • @kamaldheeriya
      @kamaldheeriya  6 месяцев назад

      Keep in touch there are more video for u in channel playlist have a look, u can also use #kamaldheeriya in youtube search to access all video of my channel.

  • @factmetro7746
    @factmetro7746 3 года назад +2

    What will be formula for 3 lenses, will this work. Sir please tell 🥺🥺

    • @architshripandey7229
      @architshripandey7229 11 месяцев назад

      Ig it will.. Just first calculate the resulatant focal length of 2 lenses (f12) and then the resultant focal length of f12 and f3 by the same formula.. Just apply the formula two times..

  • @Ajaymandojwar
    @Ajaymandojwar 2 года назад

    Awesome sir

    • @kamaldheeriya
      @kamaldheeriya  6 месяцев назад

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  • @NeonParadox_--_
    @NeonParadox_--_ Год назад

    Agar infinity ko chor ke koi object x duri pe hai toh combination se kitne duri ki hogi

    • @architshripandey7229
      @architshripandey7229 11 месяцев назад

      It would be independent of the setup ig as the angle substended by the obj on the lens wrt principal axis would be same irrespective of where you keep the new lens from the object. Also see that if in q.. Distance is given wrt O1 lens.. Ig u can take it for the combined lens too.. As angle substended by the object doesnot depend on the height of the lens and so does the focal length

    • @kamaldheeriya
      @kamaldheeriya  6 месяцев назад

      Keep in touch there are more video for u in channel playlist have a look, u can also use #kamaldheeriya in youtube search to access all video of my channel.

  • @jokeR-ij2bm
    @jokeR-ij2bm 3 года назад +2

    I can not understand how u find out value of BETA = h2/f2

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +1

      This is the approximation

    • @jokeR-ij2bm
      @jokeR-ij2bm 3 года назад +1

      Ooops

    • @jokeR-ij2bm
      @jokeR-ij2bm 3 года назад +1

      But what I have told about that F2 is focal length of second lens assuming the Ray refracted from lens 1 is parallel to principal axis

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +1

      All derivation of ray optics are is for small angles

    • @jokeR-ij2bm
      @jokeR-ij2bm 3 года назад +1

      @@kamaldheeriya 🆗 thank u

  • @ohiovic1236
    @ohiovic1236 3 года назад +4

    How does the distance f2 in the drawing represent the focal length of the second lens? .. this is not correct. It can be correct only if the incident ray is parallel to the optical axis. This is not the case for the second lens.

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +1

      R u out of yr mind, see the diagram clearly, one has more focal length and other has less compared to the first one

    • @ohiovic1236
      @ohiovic1236 3 года назад +3

      @@kamaldheeriya Incorrect. Listen to me, the point F2 is not the focus of the second lens but the focus of the system as a whole.. Many Indian videos on youtube do this bad mistake.

    • @ohiovic1236
      @ohiovic1236 2 года назад

      @蕭宇辰 Thanks!

    • @bhavinjain9367
      @bhavinjain9367 2 года назад +1

      Ya I think you are right. F2 is of whole system.

    • @nikitaanand744
      @nikitaanand744 2 года назад

      Derivations in indian books = kuch bhi krke formula la do 😏

  • @sujaykarmakar7349
    @sujaykarmakar7349 3 года назад +3

    My doubt is that what is the position of equivalent lens.. in d
    Separated by d condition? Pls reply

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +2

      Just u need only seperation between the two lens

    • @sujaykarmakar7349
      @sujaykarmakar7349 3 года назад +2

      @@kamaldheeriya and the distance between the object and equivalent new lens?

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +2

      What is the need for that, just find their equivalents focal length and than use lens formula

    • @sujaykarmakar7349
      @sujaykarmakar7349 3 года назад +2

      @@kamaldheeriya yes sir but while using lens formula what will be "u" sir?

    • @sujaykarmakar7349
      @sujaykarmakar7349 3 года назад +2

      @@kamaldheeriya sir pls reply

  • @abiralkarki1359
    @abiralkarki1359 3 года назад +4

    dont you have any pity for student ??? why after every minutes there is an ad??

    • @kamaldheeriya
      @kamaldheeriya  3 года назад +2

      I have not set it, it is by default

    • @ahmadshaikh7494
      @ahmadshaikh7494 3 года назад

      @@kamaldheeriya no it's not by default.

    • @ahmadshaikh7494
      @ahmadshaikh7494 3 года назад

      @@kamaldheeriya one can manage it how many adds to put.

    • @typing6568
      @typing6568 3 года назад

      its business dear
      lol>>>>
      who teaches in free of cost for you

  • @vadehra666
    @vadehra666 4 года назад +1

    Best explanation thanks sir

    • @kamaldheeriya
      @kamaldheeriya  4 года назад +2

      Keep in touch there are more videos for u in channel playlist have a look, u can also use #kamaldheeriya in youtube search to access all videos of my channel