A beam of electrons of energy scatters from a target having atomic spacing of

PHYSICS · Subjective · CBSE · Physics · Atoms · Atoms

Problem

A beam of electrons of energy

E

scatters from a target having atomic spacing of

1\,\text{\AA}

. The first maximum intensity occurs at

\theta = 60^\circ

. Then

E

(in eV) is _____. (Planck constant

h = 6.64 \times 10^{-34}\,\text{J s}

1\,\text{eV} = 1.6 \times 10^{-19}\,\text{J}

, electron mass

m = 9.1 \times 10^{-31}\,\text{kg}

)