Answer the following question given this paragraph: Reflecting surfaces do not have to be flat. The most common curved mirrors are spherical. A spherical mirror is called a concave mirror if the center of the mirror is further from the viewer than the edges are. A spherical mirror is called a convex mirror if the center of the mirror is closer to the viewer than the edges are. Q: The most common curved mirrors are what? Choices: - solid - concave - convex - spherical A:
The answer to this question is:
spherical