What is image shape distortion?

• A. Magnification
• B. Elongation
• C. Noise
• D. Unequal magnification of the same object

Answer: (D)

Shape distortion happens when different parts of the same object are magnified by different amounts in the image, so the outline no longer matches the true shape. If magnification were uniform across the object, you’d just see a larger version with the same proportions. But when parts sit at different distances from the image receptor or are projected at angles, rays magnify some areas more than others, warping the shape. That’s why the best description is unequal magnification of the same object. Magnification alone changes size but not shape if it’s uniform; noise is random image variation and won’t distort geometry; elongation is a specific distortion from misalignment but can arise from nonuniform magnification as well, whereas the core idea here centers on unequal magnification across the object.