Concept explainers
Suppose you point a pinhole camera at a 15-m-tall tree that is 75 m away.
a. If the detector is 22 cm behind the pinhole, what will be the size of the tree’s image on the detector?
b. If you would like the image to be larger, should you get closer to the tree or farther from the tree? Explain.
c. If you had time, you could make the image larger by rebuilding the camera, changing the length or the pinhole size. What one change would give a larger image?
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College Physics: A Strategic Approach (3rd Edition)
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