Q- The drawing shows a glass slab (*n* = 1.4) with a rectangular cross section. A ray of light strikes the slab at an incident angle of θ_{1} = 45°, enters the slab, and travels to point *P*. This slab is surrounded by a fluid with a refractive index *n*. What is the maximum value of *n* such that total internal reflection occurs at point *P*?

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IriamAbhigyan Martin Ninama