Draft:Distances/Quiz

Distances is a physics lecture, part of a series on physics concepts.

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Quiz
{Which of the following are associated with planetary nebula as a standard candle? + observations made through a narrow band 5007 filter - internal extinction - star forming regions + relatively dust-free environments + found in galaxies of all Hubble types + almost as luminous as the brightest red supergiants
 * type="[]"}

{Which of the following are associated with surface brightness fluctuations as a standard candle? + characteristic mottling + discreteness of the stars + measurable bumpiness in surface brightness + incipient resolution - MMRDs - easy to recognize
 * type="[]"}

{Which of the following are associated with red clump stars as a standard candle? + many examples within reach of parallax measurements - internal extinction - star forming regions + sufficiently bright + local group galaxies - almost as luminous as the brightest red supergiants
 * type="[]"}

{True or False, The most frequently preferred standard candle for distances to galaxies is the Type-II supernova. - TRUE + FALSE
 * type=""}

{Which of the following are associated with Type-Ia supernovae as a standard candle? - lack silicon lines + lack hydrogen lines + lack helium lines - lack lithium lines + expanding photosphere method - almost as luminous as the brightest red supergiants
 * type="[]"}

{True or False, Delta Cephei is a standard candle that is expanding. - TRUE + FALSE
 * type=""}

{AGNs may be used as standard candles because? + they are extremely luminous + can be observed at very large distances + they emit their own light signature - GeV gamma rays + reverberation mapping + tight relationship between the luminosity of an AGN and the radius of its broad line region
 * type="[]"}

{Which of the following are associated with globular clusters as a standard candle? - characteristic mottling + luminosity functions + turnover point - incipient resolution + dispersion of the distribution - easy to recognize + log-normal function
 * type="[]"}

{True or False, Betelgeuse is a standard candle. + TRUE - FALSE
 * type=""}

{Which of the following are associated with standard candles? + Cepheid variables + Type Ia supernovae + the Sun + stellar spectral type + absolute magnitude + Tully-Fisher relation
 * type="[]"}

{Yes or No, Stars whose distances have been accurately determined with trigonometric parallax can be used as standard candles. + Yes - No
 * type=""}

{Which of the following are associated with classical Cepheids as a standard candle? - characteristic mottling + young, disk objects + recent star formation - incipient resolution + pulsation phenomenon - easy to recognize + correction for absorption
 * type="[]"}

{Complete the text: The empirical relationship between the luminosity of a spiral/irregular galaxy and its { rotational velocity (i) }, known as the luminosity-line-width or { Tully-Fisher relation (i) }, has become one of the most widely used { extragalactic (i) } distance indicators.
 * type="{}"}

{Which of the following are associated with elliptical galaxies as a standard candle? - observations made through a narrow band 5007 filter + luminous galaxies - star forming regions + the Faber-Jackson relation + relationship between luminosity and central velocity dispersion + quantitative techniques based on Fourier or cross correlation methods + strongly clustered - single dominant young stellar population
 * type="[]"}

{Complete the text: Match up the standard candle with a representative image: Tully-Fisher relation - A surface brightness fluctuations - B absolute magnitude - C globular clusters - D active galactic nuclei - E Type Ia supernova - F classical Cepheid variable - G novae - H planetary nebula - I { C (i) } { H (i) }. { A (i) }. { G (i) }. { F (i) }. { B (i) }. { E (i) }. { I (i) } { D (i) }.
 * type="{}"}

{Which of the following are associated with novae as a standard candle? + luminous + old stellar population - amount of Cherenkov light + relatively dust-free environments + MMRDs + easy to recognize
 * type="[]"}

Hypotheses

 * 1) Distances are only as relative as the time it takes to travel them.