The first critical condition at which free electrons are diffracted in an FCC crystal would occur at which one of the following values of the wave number 'k'? ('a' is lattice parameter)
A. $$\frac{2}{a}$$
B. $$\frac{{\pi a}}{{\sqrt 3 }}$$
C. $$\frac{\pi }{a}$$
D. $$\frac{{\sqrt 3 \pi }}{a}$$
Answer: Option D
This Question Belongs to Electronics And Communications Engineering >> Materials And Components
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