Refraction is the bending of light rays ... which will magnify or reduce, respectively, an image in only one direction. These lenses are often combined with a spherical shape to produce a toric ...

Students use mirror equations to determine the position, type, and size of mirror images for curved mirrors mathematically. Optical density and index of refraction are defined and related to ...

In this Snapshot we will discuss the difference between reflection and refraction, how a lens focuses light and how a lens' focal length will impact an image. Give it a shot: shine a flashlight ...