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When radiographs are produced to detect defects, they show up as ___________

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in Aerospace Materials & Processes by (828k points)
When radiographs are produced to detect defects, they show up as ___________

(a) tubes

(b) dark spots

(c) invisible spots

(d) light spots

The question was posed to me by my college professor while I was bunking the class.

My doubt is from Testing Aircraft Materials in portion Testing Aircraft Materials of Aerospace Materials & Processes

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Correct choice is (d) light spots

To explain I would say: Radiography is a non-destructive method of inspecting materials. It is performed by passing either X-rays or gamma-rays through the material being tested. Defects or cracks are obtained in the picture in the form of light spots.

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