How+lens+affect+light

Standard 5 - contrast ways in which light rays are bent by concave and convex lenses.
Lenses bend light in useful ways.

Concave Lens

 * causes light rays to spread out
 * they are thicker on the ends and thinner in the middle
 * bends light rays outward

Convex Lens

 * bends light rays toward one another
 * focus light and can form an image
 * they are thicker in the middle and thinner on the ends
 * bends light rays inward
 * concave lens - ** A piece of clear material that is thinner in the middle and thicker around the edges.
 * || **convex lens** - A piece of clear material that is thicker in the middle than at the edges. ||


 * || **farsighted** - People who have trouble seeing things that are close to them. ||


 * || **lens** - A piece of clear glass or plastic that bends light rays passing through it. ||


 * || **light** - A type of energy that travels as a wave, but does not require a medium through which to travel. ||


 * || **nearsighted** - People who can see things close to them, but distant objects are blurry and difficult to see. ||


 * || **prism** - A solid object that can bend or reflect light. ||


 * || **reflection** - The change in direction that occurs when a light ray bounces off of a surface. ||


 * || **refraction** - The bending of light rays as it passes from one material into another. ||


 * || **ultraviolet rays** - An invisible form of light that causes sunburn. ||


 * || **visible light** - A part of the electromagnetic radiation that you can see with your eyes. ||