X-Ray Diffraction: Certain Planes of a Crystal of Halite Have

question 82

Multiple Choice

X-ray diffraction: Certain planes of a crystal of halite have a spacing of 0.399 nm. The crystal is irradiated by a beam of X-rays. First order constructive interference occurs when the beam makes an angle of 20° with the planes. What is the wavelength of the X-rays?

• A) 0.14 nm
• B) 0.17 nm
• C) 0.21 nm
• D) 0.24 nm
• E) 0.27 nm

---

Definitions:

Distribution of Power

The way in which authority and control are allocated among individuals and groups within a society or organization.

Power Resource Theory

A theory in political economy and sociology, suggesting that the power of social classes is rooted in their control over key resources, influencing the nature of social relations and policies.

Political Policies

Decisions, plans, or actions undertaken by a government or political entity intended to achieve specific outcomes or goals.

State-Centered Theory

Holds that the state itself can structure political life to some degree independently of the way power is distributed between classes and other groups at a given time.