The spacing of the atoms of a crystal is 159 pm. A monoenergetic beam of neutrons directed normally at the surface of the crystal undergoes first order diffraction at an angle of 58° from the normal

What is the energy of each of the neutrons? (mneutron = 1.675 × 10-27 kg, 1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 0.045 eV
B) 0.039 eV
C) 0.050 eV
D) 0.056 eV
E) 0.061 eV


A

Physics & Space Science

You might also like to view...

The unit of density in the mks system is ______________

Fill in the blank(s) with correct word

Physics & Space Science

A wave is traveling in a string at 60 m/s. When the tension is then increased 60%, what will be the resulting wave speed?

a. also 60 m/s c. 71 m/s b. 76 m/s d. 55 m/s

Physics & Space Science

As a star evolves, heavier elements tend to form by various processes. Which of the following is NOT one of these processes?

A) proton capture and neutron capture B) fusion of like nuclei C) helium capture D) the s process E) neutronization

Physics & Space Science

The process of planet formation in the early solar system is best described by which of the following terms?

A) precipitation B) consolidation C) condensation D) crystallization

Physics & Space Science