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

X-ray radiography is a well-established Non-Destructive Testing (NDT) technique used to inspect internal structures for defects, such as detecting cracks, voids, or porosity in welded joints or castings. X-ray Diffraction (XRD) is a fundamental technique in materials science used to study the atomic and molecular structure of crystalline solids by analyzing the diffraction pattern produced when X-rays interact with the crystal lattice.