2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-8

  • question_answer
    Light wave enters from medium 1 to medium 2. Its velocity in 2nd medium is double from 1st. For total interval reflection, the angle of incidence must be greater than:

    A)  \[{{30}^{o}}\]   

    B)  \[{{60}^{o}}\]

    C)  \[{{45}^{o}}\]                

    D)  \[{{90}^{o}}\]

    Correct Answer: A

    Solution :

    As, we know that \[\frac{{{H}_{2}}}{{{H}_{1}}}=\frac{{{V}_{1}}}{{{V}_{2}}}=\frac{1}{2}\] \[\frac{{{H}_{2}}}{{{H}_{1}}}=2({{\mu }_{1}}>{{\mu }_{2}})\]For total internal reflection             \[2{{H}_{1}}=\frac{1}{\sin C}=2C={{30}^{o}}\]                        


You need to login to perform this action.
You will be redirected in 3 sec spinner