A Spectral Line of a Certain Star Is Observed to Be

question 45

Multiple Choice

A spectral line of a certain star is observed to be "red shifted" from a wavelength of 500 nm to a wavelength of 1500 nm. Interpreting this as a Doppler effect, the speed of recession of this star is:

• A) 0.33c
• B) 0.50c
• C) 0.71c
• D) 0.8c
• E) c

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Definitions:

Craft Unions

Labor unions that represent workers in specific trades or crafts, focusing on specific skill sets and professions.

Labor Demand Curves

Illustrates the relationship between the wage rate and the quantity of labor that employers are willing to hire, showcasing how changes in wages can affect employment levels.

Minimum Wage

The lowest legally permissible amount that workers can be paid by employers, usually set by government policy.

Principal-agent Problem

A conflict of interest that arises when one party (the agent) is expected to act in the best interest of another (the principal) but has incentives to act in their own interest.