Which of the following is an example of an object that refracts light?

An object that refracts light changes the direction of light rays as they pass through it. Binoculars are specifically designed to take advantage of this optical property. They contain lenses that bend light in such a way that allows users to see distant objects more clearly. The lenses are made from transparent materials that have different densities, which contributes to the bending of light.

In contrast, a book, cup, and shoe do not possess the optical properties that significantly refract light in the same way that binoculars do. While they may reflect or absorb light, they do not focus it to make distant objects more visible. Therefore, binoculars are the clear example of an object that refracts light effectively.