# Refracting surface shape!

A parallel beam of light falls on a boundary separating two media of refracting indices $$1$$ & $$2$$ as shown. The beam is brought to a single point $$P$$, at a distance $$2m$$ from $$O$$. Refracting surface in $$x-y$$ plane is:

(A) Parabolic

(B) Elliptical

(C) Hyperbolic

(D) Circular

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