The y coordinate of the incident light can be changed when clicking a mouse in the area of the upper half of the drop of water and doing a drag.
The angle between the incident light and the refracting
light is maximized in the point that a dot has been put on the
left. Even if the position of the incident light changes in the
neighborhood of this point, the direction of the refracting light
doesn't change too much.
Therefore, the rainbow can be seen in this direction.
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| Author:Sadahisa Kamikawa |
Copyright(c) 1997 S.Kamikawa last update 1997.4.9
If you use this applet in your classroom please e-mail me.