SIMPLE MAGNIFIER

Ta-06 Guerrero

Ta-13 Pancho

Ta-28 Ravalo

• Composed of a single converging lens

• Used to see a larger image of an object for the eye to see.

The Human Eye

• Has a variable focal length

• Muscles in the Eye can relax for viewing from a distance or tighten for close-up viewing

• 25 cm – closest distance at which the eye can focus without much strain

Angular Magnification

• “the ratio of the angle subtended by the image when using the magnifier to the angle subtended by the object when viewed from 25 cm by the “unaided eye”

• M=θ/θ0

Example: Magnifying Glass

• Convex lens used to produce a magnified image of an object

• Usually mounted on a frame with a handle

Sources

• http://www.physics.pomona.edu/sixideas/optics/gopt5.pdf

• http://en.wikipedia.org/wiki/Magnifying_glass

• http://justglasssite.com/tag/magnifying-glass-2