When you stand in front of two mirrors with an angle, do you know how many images will be formed and why it is formed.
This applet will show you the physics of image (multiple reflections from mirrors)

You can drag the arrow with mouse drag/drop and change the angle with slider. Have fun!
[b][color=red]Click "initialize" button[/color] [/b] to view light traces!
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translate strings in simulation to different language format before download
Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1462.6kB):double click downloaded file to run it. (54 times by 35 users) , Download EJS source (23 times by 14 users) View EJS source