Review 3
Chapter 16:
How do we use the atomic emission and absorption spectra to find the composition of a star? How do we determine the rotation period of a star? How do we determine the distance to a star using Stellar Parallax? What is an H-R diagram and what information does it give us?
A star when observed through a powerful telescope has a Stellar Parallax of 0.5 arcsecs.
What is the distance to the star?
One of the Ca spectral lines coming form a distant star is red-shifted by 10 nm. This line of Ca when emitted from a stationary source in our Lab is at 500 nm. Is the star moving away of towards us and what is its speed?
Chapter 17:
Internal structure of our Sun and its chemical composition. What is the convection zone on the Sun and what are the granules and supergranules? What is the temperature in the Sun’s core? What is the photosphere, chromosphere and corona? What is their temperature and what causes their color? What is the cause of sun-spots why are they dark and why do they occur mostly in pairs and in a band around the sun’s equator?
What is the so-called differential rotation of the sun? What is the main cause of the sun’s energy? What are the sun-flares and prominences and what causes them? What is the solar wind?
Chapter 18:
Solar system formation. What is a nebula? What evidence do we have that stars form within dark interstellar clouds? What triggers the collapse of interstellar clouds to form stars? What is a protostar and how does it form? What stops a protostar from growing even more? What are the various types of main sequence stars? What is the main source of energy of a protostar and of a main-sequence star? How do the planets form in a solar system? What types of materials do you expect to find near the sun and what types of materials do you expect to find farther away from the sun within the solar system and why?
Chapters 19-20:
How do stars evolve? Stellar evolution and H-R diagrams. In what ways are main sequence stars alike and in what ways are they different? What happens to a star when it finishes the main sequence part of its evolution? How do stars make heavy elements?
How do stars die? What factors determine the lifetime, the evolutionary path and the death of a star? What is a White Dwarf? What is a Neutron Star? What is a supernova?
How are neutron stars and supernovae related? What is a Black Hole? How is a black hole formed as a consequence of a collapsing star? What is the Schwarzschild radius of a black hole?
A star of mass 10 times the solar mass became a black hole. What is its Schwarzschild radius?