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What is Understanding Lens Focal Lengths about?

1) Students measured image and object distances using a converging lens and found that as the object distance decreased, the image distance increased. 2) Plotting 1/object distance vs. 1/image distance yielded a linear relationship with a negative slope. 3) The slope of this line is equal to -1, allowing the lens equation to be derived as 1/object distance + 1/image distance = 1/focal length.

Author

NDZE Elvis Kum

Language

EN