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When the incidence angle is equal to the angle of refraction

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  1. May 19, 2016 #1
    1. The problem statement, all variables and given/known data
    When the incidence angle is equal to the angle of refraction?

    2. Relevant equations
    sina/sinb=n2/n1


    3. The attempt at a solution
    I think as a=b => sina=sinb => n1=n2. We should have the same environment? But is that refraction?
     
  2. jcsd
  3. May 19, 2016 #2

    blue_leaf77

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    At the interface of two different media, there is a certain angle of incidence where the incident ray just passes straight through. What is this angle?
     
  4. May 19, 2016 #3
    when b= pi/2 rad. It is the limit angle for a. sina=n2/n1
     
  5. May 19, 2016 #4

    blue_leaf77

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    No, that corresponds to critical angle refraction. It very simple, you have Snell's law ##n_1 \sin a = n_2 \sin b##. Try to find a trivial angle ##a=b## which will make the left and right hand side of Snell's law equal irrespective of the refractive indices.
     
  6. May 19, 2016 #5
    a=b=0 rad? 0=0
     
  7. May 19, 2016 #6

    blue_leaf77

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