A Certain Spectral Line of Hydrogen Has a Wavelength of 410.2

question 94

Multiple Choice

A certain spectral line of hydrogen has a wavelength of 410.2 nm when observed in the laboratory.If the same line appears in a star's spectrum at 410.0 nm,what can you conclude about the motion of the star?

• A)The star is moving away from the observer.
• B)The star is moving toward the observer.
• C)The star is moving but the direction is not known.
• D)The star is not moving toward or away from the observer.

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Definitions:

Group Therapy

A sociocultural approach to the treatment of psychological disorders that brings together individuals who share a particular psychological disorder in sessions that are typically led by a mental health professional.

Transference

In psychoanalysis, the process by which emotions originally associated with a significant person in one's life are unconsciously redirected onto the therapist.

Altruism

Giving to another person with the ultimate goal of benefiting that person, even if it incurs a cost to oneself.

Family Therapy

Group therapy with family members.