Question: A laser beam undergoes two refractions plus total internal reflection ( TIR ) at the interface between medium 2 and medium 3 . Which is

A laser beam undergoes two refractions plus total internal reflection (TIR) at the interface between medium 2 and medium 3. Which is true?
A.n1>n3n1n3n1.
B.n1>n3.
C. There's not enough information to compare n1 and n3.
A laser beam undergoes two refractions plus total

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