Giant stars are members of luminosity class III.
a. True
b. False
Indicate whether the statement is true or false
Question 2What happens when a core's mass is less than 3 solar masses but greater than 1.44 solar masses?
a. Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrinos of which supply neutron degeneracy pressure to support the neutron star. b. Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrons of which supply neutron degeneracy pressure to support the neutron star.
c. Electron degeneracy pressure supports the core of the white dwarf. d. Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrinos of which supply neutron degeneracy pressure to support the black hole star.
Question 3All radio telescopes are refracting telescopes.
a. True
b. False
Indicate whether the statement is true or false
Question 4Absorption lines in the spectra of supergiant stars are broader than the same spectral lines in main-sequence stars of the same spectral type.
a. True
b. False
Indicate whether the statement is true or false
Question 5What happens when a core's mass exceeds 3 solar masses and its density exceeds that which electron degeneracy pressure can support?
a. The core collapses into a black hole. b. The core collapses into a neutron star.
c. The core collapses into a white dwarf. d. The core collapses into a neutron star or a black hole.
Question 6Interferometry is easiest to use with telescopes that observe at very short wavelengths.
a. True
b. False
Indicate whether the statement is true or false
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