Lens (converging/diverging lens/mirrors)
||trace of light path
||backward tracing for virtual image
|small red lines
||distances f and 2*f away from the center of lens.
||current mouse position (x , y) relative to lens
|white vertical line
||reference line (you can click and drag it left/right)
||light path for paraxial ray assumption(mirror only)
Parameters can be changed :
Select Lens for thin lens effect(default)
select mirror for concave/convex mirror effect
default: assume paraxial ray (you can turn it off)
press toggle button +/- to change between converging/diverging
Move the object
click near tip of the object, and drag it to where you like it and release
the mouse button.
Move the lens/mirror:
click near center of the lens, and drag it to left or right.
if click with left mouse button, only lens will move.
if click with right mouse button, object will move with lens.
Change the focus length of the lens/mirror
click near the top/bottom of the lens/mirrir, then drag the mouse . Try
if you adjust the size of window, parameters reset to default values.
you can open more then one window to compare different cases, close the
created window to Quit. Press to
open another Lens window!
you can change the following parameters inside the "textfield".
related java applet lens
Would you like to try a
lense or a
thin lens combination?
Any suggestions? just click my E-mail address firstname.lastname@example.org
Thanks to : Surendranath Reddy.B.,
Tim Mewes, Mathieu.Dubreuil, Kenneth.Holmlund, ... for their valuable suggestions.
Last modified :
link to this page