Studying a Spectrum from a Star Can Tell Us a Lot

question 21

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)We can identify chemical elements present in the star by recognizing patterns of spectral lines that correspond to particular chemicals.
• C)The peak of the star's thermal emission tells us its temperature: hotter stars peak at shorter (bluer)wavelengths.
• 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:

Goods and Services

The tangible products (goods) and intangible items (services) that are produced and provided to meet consumer needs and wants.

Mode of Transportation

Mode of Transportation describes the various methods used for moving goods or passengers, including air, rail, road, and sea.

Transportation Decisions

Relate to choosing the most efficient means and routes for moving goods within the supply chain.

Supply Chain

The network connecting suppliers to manufacturers, distributors, and retailers to the consumer, ensuring the flow of goods and services.