The Light Intensity from a Particular Star Remains Essentially Constant

question 157

Multiple Choice

The light intensity from a particular star remains essentially constant except for short and regular decreases, after which it increases again to its constant value. What is the MOST plausible explanation for this phenomenon?

• A) One star is regularly eclipsing its companion as they move in mutual orbits when the plane of those orbits is close to Earth's line of sight.
• B) A variable star is pulsating in size, temperature, and intensity.
• C) The star is undergoing periodic supernova events.
• D) Shells of absorbing gas and dust are being periodically ejected from the star's surface and are subsequently dispersing into space.

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Definitions:

Cost Center Evaluation

The process of analyzing the performance and efficiency of a department or unit within an organization that does not directly generate revenue.

Controllable Margin

The amount of profit or contribution margin that a manager can directly influence by controlling costs and generating revenues.

Contribution Margin

The amount by which a product's selling price exceeds its total variable costs, indicating how much contributes to covering fixed costs and generating profit.

Dollar Amount

A specific value of money in terms of the currency of the United States, expressed in dollars.