Light travelling through three transparent substances follows the path shown in figure. Arrange ...

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Light travelling through three transparent substances follows the path shown in figure. Arrange the indices of refraction in order from smallest to largest. Note that total internal reflection does occur on the bottom surface of medium 2.
(1) \( n_{1}n_{2}n_{3} \)
(2) \( n_{2}n_{1}n_{3} \)
(3) \( n_{1}n_{3}n_{2} \)
(4) \( n_{3}n_{1}n_{2} \)
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