Physics

Problem

A beam of electrons accelerated through

54\,\text{V}

produces a first-order diffraction maximum at a scattering angle of

50^{\circ}

from a nickel crystal. If the accelerating voltage is increased to

216\,\text{V}

and the same order is observed, the new scattering angle will be closest to a)

32^{\circ}

11^{\circ}

22^{\circ}

24^{\circ}