Practice question

**Spherical mirror reflection** follows law θ_i = θ_r, focal length f = R/2, concave R negative, convex positive. Object beyond center C (u > 2f) forms image between F and C diminished, at C same size, between C and F magnified, beyond F forms at infinity, illustrating mirror equation. In a convex mirror, rays parallel to the principal axis diverge after reflection. When traced backward, these diverging rays appear to originate from the focal point behind the mirror, which is why the focal point is virtual and located on the opposite side of the incident light. Substituting values gives They appear to diverge from the