Studying a Spectrum from a Star Can Tell Us a Lot.All

question 41

Multiple Choice

Studying a spectrum from a star can tell us a lot.All of the following statements are true except one.Which statement is not true?

• A)The total amount of light in the spectrum tells us the star's radius.
• B)The peak of the star's thermal emission tells us its temperature: hotter stars peak at shorter (bluer)wavelengths.
• C)We can identify chemical elements present in the star by recognizing patterns of spectral lines that correspond to particular chemicals.
• D)Shifts in the wavelengths of spectral lines compared to the wavelengths of those same lines measured in a laboratory on Earth can tell us the star's speed toward or away from us.

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Definitions:

Cnidarian Nerve Net

A simplistic and diffuse network of nerve cells that provides sensory and motor functions in cnidarians, such as jellyfish.

Explicit Memory

A type of long-term memory involving conscious recollection of factual information, previous experiences, and concepts.

Procedural Memory

A type of long-term memory responsible for knowing how to perform different actions and skills, essentially memory of motor skills.

REM Sleep

A phase of sleep characterized by rapid eye movements, vivid dreams, and increased brain activity.