Multiple Reflection from two plane mirrors

Rays of lights are reflected from the mirror, each ray satisfying the law of reflection.
It is fun to play with two plane mirrors,  multiple images are formed.
Would you like to try it with this java applet?

There are two plane mirrors with an initial angle of 120 degree.
Click the green circle and drag the mouse to change the angle.
The red circle (with yellow background) and the blue line on the left of the mirror , represent the object to be play with.
Click inside the red circle or near the end of blue segment and drag the mouse to change size/location/orientation of the object.
Right click the mouse button to show the relations between images.
Rays of light will emit from the red circle if you click mouse button twice.
Find out the light paths and their relations to the images.
Play with it and enter the physics of optics. 
Related java aplets :
Mirror and images
Game to play with mirror.

Your suggestions are highly appreciated! Please click

AuthorĄGFu-Kwun Hwang, Dept. of physics, National Taiwan Normal University
Last modified :  More physics related java applets