Question

A section of a sphere has a radius of curvature of 0.72 m. If this section is painted with a reflective coating on both sides, what is the focal length of:

Answer 1

The focal length of a mirror is equal to half its radius of curvature.

Step-by-step explanation:

The focal length of a mirror is half its radius of curvature. For a section of a sphere with a radius of curvature of 0.72 m, the focal length would be half of that, which is 0.36 m.