Two Stars in Our Sky Have the Same Apparent Brightness

question 32

Multiple Choice

Two stars in our sky have the same apparent brightness.If neither of them is hidden behind gas or dust clouds,then we know that they

• A) may be at different distances,in which case the nearest one must have the greater luminosity.
• B) may be at different distances,in which case the farther one must have the greater luminosity.
• C) must have the same temperature.
• D) must be at the same distance away from us.

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Definitions:

Variable Costs

Costs that change in proportion to the level of activity or volume of goods produced in a business.

Unit Contribution Margin

The dollars available from each unit of sales to cover fixed costs and provide operating profits.

Fixed Costs

Expenses that do not change with the level of production or sales over the short term, such as rent and salaries.