Himanshu posted an Question
May 14, 2020 • 06:23 am 30 points
  • IIT JAM
  • Physics (PH)

Optics a rectangular glass slab abcd...

Solution As the ray is moving from water to glass I e, rarare to denser...

3 Answer(s) Answer Now
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  • Himanshu Pandey

    And Abhishek sir i think there need to be some correction at point E when you apply snells law it should be sin alpha= u2/u1 sinr

  • Himanshu Pandey

    Somnath sir ur answer is not matching although everything is correct!!!

    eduncle-logo-app

    By mistake i have considered the refractive index of glass u2 and that of water as u1.Thats why ans is not matching.u1,and u2 have to be interchanged in every place.But procedure of solving is same.

  • comment-profile-img>
    Ruby negi

    r2 is critical angle that's why ray of light is incident back into the same medium..

  • comment-profile-img>
    Abhishek singh Best Answer

    Before solving the question, you should know some concepts of Total internal reflection (TIR). So I am attaching The whole discussion of TIR, followed by the solution of this question. I hope this will clear your concept. Best regards.

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    cropped1203908637503129292.jpg
  • comment-profile-img>
    Chandra prakash

    sorry , I submitted my ans in n is refractive index.

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