Friday, 16 January 2015

Differences between Convex Lenses and Concave Lenses

The lenses are glassware or other transparent material having the ability to refract light, deflect light rays from an object and forming an image thereof. There concave and convex lenses.

1) Concave lens:

Diverging or concave lenses diverge the light beams incident in parallel on one of its face. These lenses have thinner central part edges. Light passing through a concave lens is deflected outwardly (diverges). Concave only produce virtual images, images that seem to come light rays. 

In this case it is a smaller image in front of the object (Clover). In the eyeglass, concave lenses make the eyes form a sharp image on the retina rather.

2) Convex Lens:

Convergent or Convex lenses makes the beams converge in the center and thicker than the edges. The main axis of the lens is an imaginary line perpendicular to the plane of the lens passing through its midpoint. It extends to both sides of the lens. Some distance from the lens along the main axis is the focal point (F)

Light rays impinging on a convex lens parallel to the main axis meet or converge at this point. The focal length of the lens depends both on how the refractive index of the material it is made of. A very important property of these lenses is that they produce real images.