We Are Measuring the Spectra of Two Hydrogen Gas Clouds

question 98

Multiple Choice

We are measuring the spectra of two hydrogen gas clouds. The laboratory frame wavelength of one hydrogen line is 656.2 nm. Cloud A's emission line wavelength is 660.1 nm and Cloud B's emission line wavelength is 670.1 nm. What can we conclude about these clouds?

• A)They are both approaching us, and Cloud A is approaching faster than Cloud B.
• B)They are both approaching us, and Cloud B is approaching faster than Cloud A.
• C)They are both receding from us, and Cloud A is receding faster than Cloud B.
• D)They are both receding from us, and Cloud B is receding faster than Cloud A.

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Definitions:

Mental Disorders

Conditions that affect a person's thinking, feeling, behavior, or mood, significantly impacting daily functioning and overall well-being.

Anxiety Disorders

A group of mental health disorders characterized by excessive fear, anxiety, apprehension, and worry that is difficult to control, causing significant distress or impairment in social, occupational, or other important areas of functioning.

Generalized Anxiety Disorder

A mental health disorder characterized by pervasive and exaggerated worry about multiple aspects of life, beyond what is warranted by the situation.

Cognitive-behavioral Explanation

An approach that combines cognitive and behavioral techniques to treat psychological disorders, emphasizing the role of thoughts and behaviors in the development and maintenance of problems.