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Image and blurred region size

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A radiograph is made of an object with a width of 3 mm using an x-ray tube with a 2 mm focal spot at a source-to-film distance of 100 cm. The object being imaged is 15 cm from the film. Find the size of the image and the size of the blurred region at its edges.

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This solution provides steps to find the size of the image.

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We're only given the object's width, so, really, we're missing a dimension, however we can figure out the width of ...

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