How lenses work
|
How lenses work |
|
|
|
|
| Convex lenses refract (bend) light through a single point called the focal point as seen in the animation above. The distance between the focal point and middle of the lens is called the focal length. | |
|
|
|
| The focal length changes depending on how thick the lens is. The thicker the lens the more it refracts the light passing through it and the focal length becomes shorter. A thick lens is said to be stronger than a thin lens. | |