2. Solved Papers
  3. BCECE Engineering

BCECE Engineering BCECE Engineering Solved Paper-2013

  • question_answer
    If the angle of incidence is \[i\]and that of refraction is r. Then the speed of light in the medium to which the light is refracted from air is

    A)  \[v=C\frac{\sin i}{\cos r}\]                          

    B)         \[v=C\frac{\cos r}{\cos \,i}\]                     

    C)         \[v=C\frac{\sin r}{\sin \,i}\]                       

    D)         \[v=C\frac{\sin i}{\sin \,r}\]

    Correct Answer: C

    Solution :

    We have, \[\mu =\frac{\sin i}{\sin r}\]and also \[\mu =\frac{c}{v}\] \[\therefore \]  \[\frac{c}{v}=\frac{\sin i}{\sin r}\] \[\Rightarrow \]               \[v=c.\left( \frac{\sin r}{\sin i} \right)\]


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