Answer
The two rays locate the image relative to the lens.
Work Step by Step
The "ray diagram" uses some sample rays to locate where the image is in relation to the lens. It takes many more rays to actually produce the image.
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 28 - Think and Discuss - Page 542-543: 111
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