The Concave Lens
Any lens that is "thinner in the center" than on the edges is called a concave lens and will function as a diverging lens when operating in air.
In this Worksheet we learn how light is refracted by double concave lens in a manner that a virtual image is formed.
- Any incident ray traveling parallel to the principal axis of a diverging lens will refract through the lens and travel in line with the focal point (i.e., in a direction such that its extension will pass through the focal point).
- Any incident ray traveling towards the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis.
- An incident ray that passes through the center of the lens will in affect continue in the same direction that it had when it entered the lens.