Image Formation by a Positive Lens
Crick and Drag on Applet to change the x coordinate of the Object.
Red Line: Object
Additional comments by J. Varriano:
Blue Line: Real Image
Magenta Line: Virtual Image
+: Focal Point of the Lens
Note that if the object is outside the focal point, the lens forms an inverted, real image. If the object is far away, the lens acts as a simple camera. If the object is close to the focal point, the lens acts as a simple projector.
Note that if the object is inside the focal point, the lens forms a magnified, upright, virtual image. The lens acts as a simple magnifying glass.
Copyright(c) 1996 S.Kamikawa. All rights
reserved.(last update 1997.1.6)