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Ray Optics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRay Optics1 Mark
MCQ
Light wave enters from medium $1$ to medium $2.$ Its velocity in $2^{\text {nd }}$ medium is double from $1^{\text {st }}$. For total internal reflection the angle of incidence must be greater than
  • ✓
    $ 30^{\circ} $
  • B
    $ 60^{\circ} $
  • C
    $ 45^{\circ} $
  • D
    $ 90^{\circ}$
✓

Answer

Correct option: A.
$ 30^{\circ} $
$ 30^{\circ}$

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