Large Neutron-Scattering Facilities Have Been Established to Study the Structure

question 4

Multiple Choice

Large neutron-scattering facilities have been established to study the structure of materials since one of their advantages is that their wavelengths can be as small as the distance between atoms. For thermal 25° C) neutrons of energy 40 meV, calculate their de Broglie wavelength.

• A) 4.8 × 10^-10 nm
• B) 0.20 nm
• C) 0.14 nm
• D) 4.8 × 10⁺¹⁰ nm
• E) 2.0 nm

---

Definitions:

Flooding

An exposure therapy in which clients are exposed repeatedly and intensively to a feared object and made to see that it is actually harmless.

Psychological Debriefing

A structured conversation following a traumatic event intended to help those affected process their experiences and reduce stress.

Eye Movement Desensitization

A therapeutic method, often used within the broader context of EMDR therapy, aimed at alleviating the distress associated with traumatic memories.

Reprocessing

A psychological technique aimed at helping individuals to re-examine and reinterpret past experiences from a new perspective.