Answer to Question #285016 in Physics for Kisibo

Question

The radii of Na+ and Cl ions are 0.98 and 1.81 Å respectively. The Young's modulus of NaCl

[100] direction is 5 * 10 ^ 10 * N * m ^ - 2 . Assuming that the extension in [100] direction produces

negligible contraction in the perpendicular directions, calculate the wavelength at which the

electromagnetic radiation is strongly reflected by NaCl crystal. Atomic masses of Na and Cl

are 23 and 35.5 amu respectively.

[6 marks]

Answer 1

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