The Puzzle About Quasar Spectra,which Was Finally Solved by Maarten

question 332

Multiple Choice

The puzzle about quasar spectra,which was finally solved by Maarten Schmidt,was that:

• A) the characteristic pattern of hydrogen spectral lines was seen but at much greater blueshifts than is usual from hydrogen in stellar sources.
• B) the brightnesses of hydrogen lines in the familiar spectral sequence were seen to fluctuate wildly over times of seconds from such a bright and therefore presumably large object.
• C) the characteristic pattern of hydrogen spectral lines was seen but at much greater redshifts than is usual from hydrogen in stellar sources.
• D) a familiar spectral line sequence of hydrogen lines was detected from these starlike objects, but they had intensity ratios between lines radically different from those seen in spectra from nearby stars.

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Definitions:

Graph of Equation

A visual representation of all the points that satisfy a given equation, plotted on a coordinate grid.

Method of Substitution

A technique used to solve systems of equations by solving one equation for one variable and then substituting that expression into another equation.

System of Equations

A set of two or more equations with the same set of unknowns, which are solved together to find a common solution.

Method of Substitution

A technique used to solve systems of equations where one equation is solved for one variable, which is then substituted into other equations.