Question

Firat order Bragg's diffraction was observed from (1 1 1)planes of a simple cubic lattice having lattice parameter a=0.265nm using x-rays of wavelength 0.153nm.Bragg angle (theta) is
1. 15 degree
2. 30 degree
3. 45 degree
4. 60 degree​

Answer 1

it will be 15 30 45 or 60 any one will be the answer write it