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Ray Diagrams for Convex Lenses

Now that we understand these basic rules governing lenses we can create what are called ray diagrams in order to predict the position, orientation, and size of the image generated by the lens.

3. The image point of the top of the object is the point where the two refracted rays intersect. Note that if the two refracted rays intersect on the same side of the lens as the object the image formed in called a virtual image.

Go to interactive calculator.

Ray Diagrams for Concave Lenses

Now that we understand these basic rules governing lenses we can create what are called ray diagrams in order to predict the position, orientation, and size of the image generated by the lens.

3. The image point of the top of the object is the point where the two refracted rays intersect. Since the refracted rays are diverging, they must be extended behind the lens in order to intersect. When the image is formed on the same side of the lens as the object it is know as a virtual image.

Go to interactive calculator.
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