in the following unit cell, which vector represents the 121 direction?\na\nb\nc\nd
in the following unit cell, which vector represents the 121 direction?\na\nb\nc\nd
Answer
Explanation:
Step1: Recall Miller - indices concept
Miller - indices [uvw] represent a direction in a unit - cell. The components u, v, and w are the number of unit - cell edge lengths traversed in the x, y, and z directions respectively.
Step2: Analyze each vector
For vector A: It has a non - standard set of displacements in the x, y, z directions that do not match [121]. For vector B: Consider the displacements from the origin to the end - point of the vector. If we assume the unit - cell edge lengths as the reference, the displacements in x, y, z directions are consistent with [121]. For vector C: Its displacements in the x, y, z directions do not match [121]. For vector D: Its displacements in the x, y, z directions do not match [121].
Answer:
B. Option B