- #1

BruceSpringste

- 38

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## Homework Statement

"A beam of neutrons that emerges from a nuclear reactor contains neutrons with a variety of energies. To obtain neutrons with an energy of 0.050 eV, the beam is passed through a crystal whose atomic planes are 0.20 nm apart. At what angles relative to the original beam will the desired netruons be diffracted?"

## Homework Equations

Braggs law

mλ=sin2θ

## The Attempt at a Solution

My first thought was to use braggs law and simply solve for θ and m=1,2,3... but θ>90degrees.

However the problem seems a lot more complex than that. My book doesn't have any answers to the question so I can't double check if I have done this right!