The crystal structure of a substance can be determined using X-ray diffraction.It can also be determined using neutron scattering.What is the kinetic energy of a neutron that has a wavelength of 0.1 nm? A)0.14 eV B)0.082 eV C)0.034 eV D)0.23 eV E)0.38 eV

Question

Quizplus · Accepted Answer

The kinetic energy of a neutron is given by the formula: KE = (hc/λ)(hc/λ) / (2m), where h is Planck's constant, c is the speed of light, λ is the wavelength of the neutron, and m is the mass of the neutron.

Substituting the given values, we get: 
KE = (6.626 x 10^-34 J s x 3 x 10^8 m/s / (0.1 x 10^-9 m))^2 / (2 x 1.675 x 10^-27 kg)

Simplifying, we get:
KE = 0.082 eV

Therefore, the answer is B.

The Crystal Structure of a Substance Can Be Determined Using