Optics is the study of the properties and behavior of light. In this section you can learn about everything from holograms to lasers and lenses.

How does a Fresnel lens work?

I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.