Which statement about magnification in VT is most accurate?

• A. Magnification always distorts the image
• B. Magnification is never required in VT
• C. Magnification improves detail but can distort if working distance is not maintained
• D. Magnification eliminates the need for proper lighting

Answer: (C)

Magnification is a viewing aid in visual testing that reveals finer details, but the image quality and accuracy depend on keeping a consistent working distance. If the distance between the lens and the part isn’t controlled, the magnified image can change scale and perspective, leading to distorted features and unreliable measurements. With proper technique—maintaining the correct working distance, alignment, and calibration—magnification enhances detail without introducing distortion. Lighting remains essential; magnification doesn’t replace good illumination. This combination explains why the statement about improving detail while allowing distortion if the working distance is not maintained is the best fit.