Geometric Optics
Name___________________
Use the grids to help you draw the diagrams, neatly and to scale. The hash marks are 5 squares apart.
Use the diagrams to answer some questions for each situation. The thick horizontal line is the optical
axis. The focal points are shown as dots. To describe where the image is, just count how many squares
the image is away from the lens or mirror. Mention which side the image is located. To describe the
height of the image, just list how many squares tall the image is. Your objects and images will be arrows
for convenience.
1) Make the ray diagram and describe the location and size of the image formed by the converging lens.
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Location________________________ Size _____________
2) Make the ray diagram and describe the location and size of the image formed by the converging lens.
Hint: The focal points are 15 squares from the lens, and the object is 30 squares away from the lens.
Location___________________
f
Is the image the same size as the object?_________
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3) Make the ray diagram and find the location and size of the image formed by the concave mirror.
Location__________________
Is the image upside down or right side up?____________
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