A concave spherical surface with radius r separates a medium with index of refraction 2 from air. As an object is moved toward the surface from far away along the central axis, its image:
A) changes from virtual to real when it is r/2 from the surface
B) changes from virtual to real when it is 2r from the surface
C) changes from real to virtual when it is r/2 from the surface
D) changes from real to virtual when it is 2r from the surface
E) remains virtual

Question

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The Answer of A concave spherical surface with radius r separates a medium with index of refraction 2 from air. As an object is moved toward the surface from far away along the central axis, its image:
A) changes from virtual to real when it is r/2 from the surface
B) changes from virtual to real when it is 2r from the surface
C) changes from real to virtual when it is r/2 from the surface
D) changes from real to virtual when it is 2r from the surface
E) remains virtual

A Concave Spherical Surface with Radius R Separates a Medium