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Geometrical Optics question

2009 · Shift 0 · Q53
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Geometrical Optics question

2009 · Shift 0 · Q53

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1
A transparent solid cylindrical rod has a refractive index of 23.{2 \over {\sqrt 3 }}.3​2​. It is surrounded by air. A light ray is incident at the mid-point of one end of the rod as shown in the figure. AIEEE 2009 Physics - Geometrical Optics Question 213 English The incident angle θ\thetaθ for which the light ray grazes along the wall of the rod is :
  1. A
    sin⁡−1(32){\sin ^{ - 1}}\left( {\frac{{\sqrt 3 }}{2}} \right)sin−1(23​​)
  2. B
    sin⁡−1(23){\sin ^{ - 1}}\left( {\frac{2}{{\sqrt 3 }}} \right)sin−1(3​2​)
  3. C
    sin⁡−1(13){\sin ^{ - 1}}\left( {{1 \over {\sqrt 3 }}} \right)sin−1(3​1​)
  4. D
    sin⁡−1(12){\sin ^{ - 1}}\left( {\frac{1}{2}} \right)sin−1(21​)
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