The plane face of a plano - convex lens is silvered. If µ be the refractive index and R be the radius of curvature of curved surface
The plane face of a plano - convex lens is silvered. If µ be the refractive index and R be the radius of curvature of curved surface then system will behave like a concave mirror of radius of curvature(a) µR(b) R2 / µ(c) R / (µ − 1)(d) [(µ + 1)/(µ - 1)]R
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The answer is (d): [(µ + 1)/(µ - 1)]R. When a plane-convex lens is silvered on its planar surface, it will behave like a concave mirror, but with a different radius of curvature. This new radius of curvature is determined by the formula [(µ + 1)/(µ - 1)]R, where µ is the refractive index of the lens material and R is the radius of curvature of the convex surface.
