radius of curvature in case of plane mirror
Plane mirror Mathematically, a plane mirror can be considered to be the limit of either a concave or a convex spherical curved mirror as the radius, and therefore the focal length, becomes infinite.[4]
Crocodile (Black Mirror) Filmed in Iceland, the episode centres on Mia (Andrea Riseborough) who is distressed about having helped her friend Rob (Andrew Gower) cover up a hit-and-run death. Fifteen years later, Rob wants to confess their crime, leading Mia to kill him and dispose of his body. Shortly after, Mia witnesses a road accident between a pedestrian and self-driving vehicle. Shazia (Kiran Sonia Sawar) meanwhile is hired to investigate the accident, and uses a Recaller device that allows her to see the recent memories of those she interviews.