Spherical Lenses
Share
Spherical Lenses
Light of Class 10
SPHERICAL LENSES
A lens is a piece of transparent refracting material bounded by two spherical surfaces or one spherical and another plane surface.
A lens is the most important optical component used in microscopes, telescopes, cameras, projectors, etc.
Basically lenses are of two types :
- Convex lens or converging lens
- Concave lens or diverging lens
Convex lens and its type:
A lens that is thick at the center and thin at the edges is called a convex lens. The most common form of a convex lens has both surfaces bulging out to the middle. Some forms of the convex lens are shown in the figure.
 |
||
| Double convex | Plane convex | Concavo convex |
Concave lens and its type:
A lens that is thin in the middle and thick at the edges is called a concave lens. The most common form of a concave lens has both surfaces depressed inward in the middle. Some forms of concave lenses are shown in the figure.
Different types of concave lens
