QUESTION 48 Bloch's theoreom for a periodic potential state that: ○A. y(x) = u(x) eikx ○ B. y(x) = u(x) e¹k (x +a) OC. y(x+a)= u(x) ekr ODy(x+a)= ⒸE₁ w₁(x) = e¹kx E. u(x+a) eikx
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