Question

The powdered line are broadened in the crystal during which of the following phenomenon?

(a) Uniform strain is applied

(b) Uniform stress is applied

(c) Non uniform stress is applied

(d) Non uniform strain is applied

This question was addressed to me in a dream while sleeping

This question is from Effect of Stress on a Powder Pattern topic in section X-Ray Diffraction of Solid State Chemistry

Answer 1

Correct option is (c) Non uniform stress is applied

For explanation I would say: When a non uniform stress is applied to the crystal, different crystals or different parts of the same crystal may be deformed to differing degrees and the powder lines become broadened.