Question

For what thickness of a material, do the X-rays give the best results?

(a) 50 mm

(b) 55 mm

(c) 60 mm

(d) 65 mm

I got this question in an interview for internship.

I want to ask this question from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II

Answer 1

Right option is (a) 50 mm

To elaborate: X-rays are considered to be having a larger wavelength as compared to that of gamma rays. Owing to this fact, the penetration power of the X-rays is less. Hence, for a shorter thickness, it would give good detection. The best results are obtained in X-ray detection when the thickness of the material is below 50mm.