In a powder diffraction photograph of copper (fcc structure with a lattice parameter of 0.3608 nm) taken with a cu-ka radiation (γ = 0.154 nm), the Bragg angle for the first line is

A. decreases B. increases C. remains constant D. shows no systematic variation

A. Burger vector and the dislocation line are Parallel to each other for screw dislocations B. Burger vector and the dislocation line are perpendicular to each other for edge dislocations C. Screw dislocations glide parallel to its Burger vector D. Edge dislocations glide parallel to its Burger Vector

A. 210 B. 220 C. 222 D. 310

A. 18110 B. 18300 C. 19360 D. 19890