World Through a Hole
This java applet let you play with a virtual pinhole viewer.
How could the light from the source get through the tiny pinhole
to create a complete image of the source?
Why is the image upside down on the screen?
Think about the path of light.
What do you think would happen if you enlarge the pinhole size?
Does the image become more or less clear?
How to play:
Click LEFT mouse button
at blue dots at character F
show the light path emitted.
at bottom near character F
drag left/right to move F
at pinehole and drag the mouse to change the location of the pinehole box.
- at pinehole and drag the mouse to change the size of the hole.
(Mac: hold CTRL-button and click mouse button == RIGHT Clcik in MS widnows)
- at other place to change the view angle of the system.
Click mouse 3 times quickly to reset the system.
Your suggestions are highly appreciated! Please click
Hwang, Dept. of physics,
Taiwan Normal University