Ejs Open Source Refraction Wave Model across 2 straight media java applet

[lookang]

Ejs Open Source Refraction Wave Model across 2 straight media java applet
author fu-kwun hwang, remixed by lookang
from here http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=152.0

for learning objectives
State that waves can change direction as they cross straight boundaries between media and that this is called refraction
Explain that refraction is caused by a change of speed in the media and use rules to predict which way the ray bends when density changes


there is another good simulation here
http://phet.colorado.edu/en/simulation/bending-light

enjoy!

Embed a running copy of this simulation
<applet code='users.sgeducation.lookang.twomediaspeedwee3_pkg.twomediaspeedwee3Applet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/14019/ejs_twomediaspeedwee3.jar' name='twomediaspeedwee310216' id='twomediaspeedwee310216' width='800' height='394' 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=10216' 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!

[lookang]

changes made include:

re-layout according my usual design
added second set of arrows (yellow) and dynamic text v = XXX c as it enters the medium 2
made medium 1 white
made drag-gable point green and remove associated slider for simpler control-layout
added hint that shows h2/h1 as the ratio of n2/n1

enjoy!