Teachers' Domain, Galileo's Telescope,
published January 29, 2004, retrieved on
September 27, 2008,
Refraction--the bending of waves--occurs whenever a wave
(like a light wave!) changes medium--because the wave front either
slows down or speeds up. Refraction is a naturally occurring phenomena
you see responsible for such events like rainbows, mirages, sparkling
diamonds, and fiber optics cables--refraction is also why lenses work so
your eye can see and we can build such fun things like cameras, movie
projectors, binoculars, CD players, and telescopes! Enjoy your
explorations of refraction!
Use the Optics Bench to study how using the principal
rays for lenses we can locate and determine the nature of images
formed in converging and diverging lenses.
Optional Converging Lens Sim:
In this lab sim you will explore how images are formed in both convex
(converging) and concave (diverging)--notice how the 3 principal rays
determine where the image of the object is formed! You may need to
hit F5 to refresh the page if you're having any trouble and hit F11 for
a Full Screen view to fit the whole sim on your screen!
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