GATE Solid State Physics: diffraction methods for structure determination – Previous Year Questions

4 GATE previous year questions on diffraction methods for structure determination (Solid State Physics, Physics) with answers and explanations, from every paper.

1. GATE 2022 PH Q62 (2 marks, Numerical answer) – In an X-Ray diffraction experiment on a solid with FCC structure, five diffraction peaks corresponding to (111), (200), (220), (311) and (222) planes…
2. GATE 2023 PH Q45 (2 marks, Multiple choice) – A neutron beam with a wave vector k⃗ and an energy 20.4 meV diffracts from a crystal with an outgoing wave vector k⃗ ′. One of the diffraction peaks…
3. GATE 2025 PH Q33 (1 mark, Numerical answer) – Powder X-ray diffraction of a cubic solid with lattice constant a has the (111) diffraction peak at =30. If the lattice expands to 1.25a, the angle…
4. GATE 2024 PH Q39 (2 marks, Multiple choice) – The X-ray diffraction pattern of a monatomic cubic crystal with rigid spherical atoms of radius 1.56 Å shows several Bragg reflections of which the…