SVCAUSA 2010 |

| There are two kinds of lenses, the converging lens and diverging lens. The diverging lens is also known as a concave lens. It is because one or both sides is concave. When parallel light rays goes through a diverging lens, they come out on the other side, spreading out.
Likewise, a converging lens makes a parallel rays that goes through it converge at a single point. The point is called focal point and is found on the other side. The lens is also known as
Let us get familiar with certain optics terms. In the diagram, the parallel rays passing through a converging lens met at a certain point called Focal length is the length of which each of the focal points lies a fixed distance from the lens. It is expressed in meters. The reciprocal of a lenses focal length is called its Focal points lie on a line which goes through the middle of the lens. This line is identified as the Posted 2010-11-08 and updated on Nov 08, 2010 3:50am by |