A concave spherical surface with radius R separates a medium with index of refraction 2 from air. If an object is moved toward the surface from far away along the central axis, its image :

Question

G1 Physics · Accepted Answer

Derived solution: Step 1: For paraxial refraction at a spherical surface use n₂/v - n₁/u = (n₂ - n₁)/R, applying the Cartesian sign convention at each surface. Step 2: Substitute the values given in the question and apply the geometry/sign convention shown. Step 3: On simplification the result is Remains virtual. Therefore the correct option is D.