Last chapter was mostly about plane, flat mirrors.
In this chapter we will talk about curved mirrors. There are two types of curved mirrors: first we have a concave mirror, which curves in (like a cave). Second we have a convex mirror, these curve outward.
When a mirror is curved, the light gets reflected differently. Use https://ricktu288.github.io/ray-optics/simulator/ to build different curved mirrors and see how the light gets reflected. You can look at the following tutorial on the applet.