A Beam of X-Rays of Different Frequencies Is Reflected at 10

question 22

Multiple Choice

A beam of X-rays of different frequencies is reflected at 10 degrees off a crystal of interatomic spacing 0.2 nm. Which X-ray wavelength is preferentially reflected?

• A) 0.0943 nm
• B) 0.139 nm
• C) 0.0695 nm
• D) 1.02 × 10−¹⁰ m
• E) 3.47 × 10−¹¹ m

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Definitions:

Descartes

A 17th-century French philosopher, mathematician, and scientist who made significant contributions to the development of modern philosophy and the theory of knowledge.

Artistic Relics

Historical objects or pieces of art which hold cultural, religious, or sentimental value, often preserved due to their significance.

Emotional Expressions

The way emotions are outwardly displayed and communicated to others through facial expressions, voice pitch, body language, and other behaviors.

Darwin

Charles Darwin, a 19th-century naturalist, geologist, and biologist known for his theory of evolution through natural selection.