Objects can become charged via a transfer of electrons from one object to another. An example of this transfer is when you shuffle across a carpet or when a plastic rod is rubbed with a piece of fur. A concave lens or mirror has at least one side that bulges inward. A concave lens produces diverging light rays. See also reflect , refract , focal length , focal point converge To move in the same direction or towards a common point.
Light converges when it passes through a convex lens.
A convex lens or mirror has at least one side that bulges outward. A convex lens produces converging light rays. A convex mirror produces diverging rays. A phenomenon that occurs whenever a wave is obstructed in any way. Often diffraction fringes can be seen when a small aperature or object blocks light waves.