The lengthening of the wavelength of a photon as it escapes from a gravitational field is known as__________.
A) gravitational blueshift
B) gravitational redshift
C) photonic adaptation
D) photon occultation
Question 2In the context of the stars in binary systems, which of the following statements is true of the Roche lobes?
A) Binary stars do not permit the transfer of mass from one star to the other.
B) Matter inside a star's Roche lobe can be transferred to the companion star.
C) A star's Roche lobe prevents any matter from outside the lobe from being lost.
D) The Roche lobes can interfere with the evolution of the stars that are close together.
Question 3Which of the following statements is true of type I supernovae?
A) They occur when a white dwarf has a lower mass than the Chandrasekhar limit.
B) They appear to be produced by the collapse and explosion of a massive star.
C) They are seen as a dimming star from Earth.
D) They have no hydrogen lines in their spectra.
Question 4In the context of giant stars, helium fusion produces _____ that accumulate in an inert core.
A) nitrogen and carbon
B) hydrogen and neon
C) oxygen and neon
D) carbon and oxygen
Question 5The ignition of helium in the core of a star changes the structure of the star. The star now makes energy in two locations by two different processes, _____.
A) carbon fusion in the core and helium fusion in the surrounding shell
B) helium fusion in the core and nitrogen fusion in the surrounding shell
C) helium fusion in the core and hydrogen fusion in the surrounding shell
D) nitrogen fusion in the core and helium fusion in the surrounding shell
Question 6In the context of helium fusion, if the core of a post-main-sequence star has no nuclear reactions, the star is a__________.
A) red giant
B) green giant
C) gray giant
D) yellow giant
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