A reduced virtual image if formed by a single negative lens regardless of the object position. An enlarged virtual image can be formed by a positive lens by placing the object inside the principal focal point.
Wednesday, August 8, 2007
Ray diagram for Covex lenses
For an object outside the focal point, a real inverted image will be formed.
Ray diagram for Convex mirror
A convex mirror forms a virtual image.
Using a ray parallel to the principal axis and one incident upon the center of the mirror, the position of the image can be constructed by back-projecting the rays which reflect from the mirror. The virtual image that is formed will appear smaller and closer to the mirror than the object.
Ray diagram for Concave mirror
If the object is outside the focal length, a concave mirror will form a real, inverted image.
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