This following applet is [b]illustrate refraction with dog running[/b]
Created by prof Hwang Modified by Ahmed
Original project [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1384.0]illustrate refraction with dog running[/url]
The velocity of wave changes when wave move from one media into another media.
For light: The index of refraction is defined as , where c is the speed of light in vacuum, and v is the speed of light in media.
The following animation use many dogs running from one region into another region.
Due to the condition on the ground , dogy's speed is different when running from one region into another region.
It obeys Snell's Law .
You can use slider to change speed of running dogs and c1 to change it moving direction.