Class/Course - Class XII

Subject - Physics

Chapter - Ray Optics and Optical Instruments


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Q.1 A transparent solid cyclinder rod has a refractive index of 2/√3. It is surrounding by air. A light ray is incident at the midpoint of one end of the rod as shown in the figure.
 

The incident angle θ for which the light ray grazes along the wall of the rod is
  sin-1(1/2)
  sin-1(√3/2)
  sin-1(2/√3)
  sin-1(1/√3)