X-rays can be used to: 1. inspect welded joints between two metal parts of a machine. 2. study the structure of crystals. Select the answer using the code given below:

  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2

Correct Answer: C. Both 1 and 2

Explanation

X-rays are used in industrial radiography to detect flaws in welds and in X-ray crystallography to determine the atomic structure of crystals[cite: 1].

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