The Technique Called Photometry in Stellar Astronomy Is the Measurement

question 36

Multiple Choice

The technique called photometry in stellar astronomy is the measurement of the

• A) arrival times of photons from variable and pulsating stars to determine accurately the pulsation or rotation periods of these stars.
• B) intensity of light from stars through several limited-bandpass filters from which surface temperature, variability, luminosity, and so on of stars can be determined.
• C) relative absorption of light by different atoms and molecules in high-resolution spectra of starlight, from which stellar temperatures can be estimated.
• D) precise positions and relative motions of stars in the Galaxy, from which galactic structure and overall rotation can be determined.

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Definitions:

Stackelberg Model

Oligopoly model in which one firm sets its output before other firms do.

Dominant Strategy

In game theory, a strategy that is the best choice for a player, regardless of what the other players choose.

Reaction Function

In game theory, a strategy that outlines how one player will react to the choices of other players, aiming to maximize their own payoff.

Cournot Equilibrium

A situation in an oligopoly market where each firm chooses its optimal output level assuming the output levels of its competitors are fixed.