The Apparent Reddening of Light from Stars After Its Passage

question 297

Multiple Choice

The apparent reddening of light from stars after its passage through the interstellar medium (ISM) is caused by:

• A) the additional contribution to this starlight by emission from hydrogen gas in the ISM.
• B) preferential scattering of blue starlight by fine dust grains.
• C) Zeeman shift of the light by the powerful magnetic fields existing within the ISM.
• D) scattering of this light from rapidly moving material; the light is Doppler-shifted toward the red end of the spectrum.

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Definitions:

Sharpe Ratio

A measure used to evaluate the risk-adjusted return of an investment portfolio.

Standard Deviation

A statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.

Inflation

A general increase in prices and fall in the purchasing value of money over time.

Taxes

Mandatory financial charges or levies imposed by governments on individuals or entities to fund government spending and various public expenditures.