Is it a square?

[ahmedelshfie]

The applet design by Prof Hwang, Modified by Ahmed.
Original applet Is it a square?

Do you see a square?

You can change color c, width D and stroke with slider!
 

Embed a running copy of this simulation
<applet code='users.egy.ahmed.illusion_square_pkg.illusion_squareApplet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/37048/ejs_illusion_square.jar' name='illusion_square7890' id='illusion_square7890' width='501' height='401' mayscript=true><param name='draggable' value='true'></applet>
Embed a running copy link(show simulation in a popuped window)
<a href='http://www.phy.ntnu.edu.tw/ntnujava/msg.php?smfejs=7890' target='smfejs'>Run simulation</a>

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

• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
• Upload worksheets as attached files to share with more users.

Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!