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- Holding a magnifying glass against a wall at the proper distance usually will provide a picture of the lit-up parts of the room. Note that that distance varies, depending on the distance of the object concerned from the lens. Objects that are far away will require a distance called the focal length, while objects that are closer to the lens require a longer distance for a sharp picture of that object on the wall.
- Eye glasses restore proper sight to very many people, also eyepieces of optical instruments include lenses.
- Photography has many uses
Refraction at a spherical interface[edit | edit source]
See also wikipedia:Refraction
A lens[edit | edit source]
Locating the image[edit | edit source]
The lensmaker’s equation[edit | edit source]
Converging and diverging lenses[edit | edit source]