
Concept explainers
Introduction: The distance between the atomic layers in a crystal can be calculated by using Bragg’s law.

Answer to Problem 1SAQ
Correct answer: The separation between atomic layers is
Explanation of Solution
Justify reasons for the correct answer:
Calculate the separation between the atomic layers in the crystal by using the rearranged equation of Bragg’s law as follows:
Here, n is the order of diffraction (an integral number),
Substituting the known values:
There fore, option (d) is correct.
Justify reasons for the incorrect answer:
Option (a) results by using the wrong equation of Bragg’s law as follows:
Or:
So, it is an incorrect answer.
Option (b) has the wrong value. So, it is an incorrect answer.
Option (c) has the same value as the wavelength of the incident light. No equation is used. So, it is an incorrect answer.
Hence, options (a), (b), and (c) are incorrect.
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Chapter 12 Solutions
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