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Electron Diffraction for various materials

1. The diffraction of a crystal follows which equation?

a: Williamson b: Braggs c: Henry d: Eular

2. The selection rule of planes for a simple cubic (SC) crystal is

a: all (h,k,l) planes are allowed b: (h+k+l) is even c: (h+k+l) is odd d: (h, k, l) are all odd or all even (unmixed)

3. The selection rule of planes for a body centered cubic (BCC) crystal is

a: all (h,k,l) planes are allowed b: (h+k+l) is even c: (h+k+l) is odd d: (h, k, l) are all odd or all even (unmixed)

4. The selection rule of planes for a face centered cubic (FCC) crystal is

a: all (h,k,l) planes are allowed b: (h+k+l) is even c: (h+k+l) is odd d: (h, k, l) are all odd or all even (unmixed)

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