Two glass slabs of thickness $t_{1}$ and $t_{2}$ are joined to make L shape as shown in the figure. The refractive indices of both glass slabs are same. A light ray is incident at point ‘P’ with an angle of incidence $θ$ as shown in the figure. It is assumed that refraction takes place from both the glass slabs. Then choose the correct option(s).

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Emergent ray passes from Q if $t_{1} = 2 t_{2}, θ = 45^{0} .$

Emergent ray passes below ‘Q’ if $t_{2} < t_{1}, θ = 45^{0}$

Emergent ray passes from Q if $t_{1} = 2 t_{2}, θ = 30^{0} .$

Emergent ray passes above ‘Q’ if $t_{2} > t_{1}, θ = 45^{0}$

answer is C, D.

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