Reflection of light by curved surfaces

Explain reflection of light at a plane surface with the help of a neat ray diagram.

Reflection from curved surface||Basic Terms||Sign Convention

Reflection Of Light Through Curved Surfaces|Spherical Mirror|Two Types Of Spherical Mirrors|Important Terms Used In Spherical Mirrors|Relation Between Radius Of Curvature And Focal Length|Practice Exercise Questions|Summary

Plane surface of a thin planoconvex lens reflects 50% of light, while the curved surface is completely transparent, if final image of O after refraction through lens coinsides with the image formed due to partial reflection from plane surface. if distance (in m) between O and lens is x then find x//4

Reflection from curved surface

Reflection of light and Refraction of light .