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

question 10

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)0.069 5 nm
• D)1.02*10^-10 m
• E)3.47 *10^-11 m

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Definitions:

Arousal

Physiological activation (such as increased brain activity) or increased autonomic responses (such as increased heart rate, sweating, or muscle tension).

Incentives

External objects or external goals, rather than internal drives, that motivate behaviors.

Drive Reduction

A motivation theory that suggests behavior is motivated by the desire to reduce internal drives of tension or arousal that arise from unmet needs.

Pleasure Principle

A psychoanalytic concept suggesting that individuals seek pleasure and avoid pain to satisfy their biological and psychological needs.