Review Sheet Test 1: [Class Home Page]

Review Sheet for Test 1, January 23, 2004

1) What are the different kinds of light? Which has long wavelength? Which has short?
2) Which forms of light have the highest energy photons? Which have the lowest energy?
3) What form of light has the highest frequency? What can we see with our eyes?
4) How are wavelength and frequency related? What is 'c'? What is it's speed (in km/s)?
5) How long does light take to reach Earth? The Moon? Pluto? The nearest Star?
6) Know Wien's Law and Stefan-Boltzmann's Law. What kind of light does this apply to?
7) What is `wavelength of maximum intensity'? How is this related to object temperature?
8) Which is hotter: A blue star or a red star? For equal surface areas, which is brighter?
9) What is absolute zero (Kelvin)? Why is nothing at absolute zero? Why do all things radiate?
10) What is in the nucleus of atoms? What elemental particle in an atom defines the element?
11) Know: Excitation, de-excitation and transitions using energy level diagrams.
12) What is the ground state and the excited state and why/when does the atom change states?
12) Why do the emission or absorption spectra of different elements have unique spectral lines?
13) What creates a continuum spectrum? What creates an absorption spectrum? Emission spectrum?
14) What are `atmospheric windows'? Which forms of radiation reach Earth's surface? Which don't?
15) What is the sun made of? How has its' abundance changed in billions of years? Why?
16) Know the broad characteristics of the Sun (size relative to Earth, density relative to water, etc)
17) How does the density and temperature vary with radius in the Sun's interior? In its atmosphere?
18) Why does the Sun have an absorption spectrum in the optical? Where is it an emission spectrum?
19) Know the 4 forces of nature. Which have infinite range? Which is important in fueling the sun?
20) What holds together the nucleus? The atom? Which force holds molecules together?
21) What is fusion? What is fission? What's important about Iron (Fe) in fusion AND fission?
22) What's the p-p chain? What's happening? Know the bottom line (what goes in, what comes out).
23) How is Einstein's equation E=mc2 related to the proton-proton chain?
24) Where does hydrogen fusion occur in the sun? Why there? What are Coulomb forces?
25) Know the internal structure of the Sun. How is energy transported to the Sun's surface?
26) How do we know the Sun's interior (Density, Temp)? What is the solar neutrino problem?
27) How does one best see the Sun's photosphere? Its chromosphere? Its Corona?
28) What drives solar activity? how are sun spots, flares, prominences and coronal holes related?
29) How do sunspots differ from the surrounding photosphere? (temperature, magnetic field)
30) What's the Babcock model? What is the sunspot cycle? How is magnetic field important?
31) How do flares and coronal mass ejections effect us here on Earth? What events are seen?
32) Understand ABSOLUTE versus APPARENT. Which is Flux? Which is Luminosity?
33) What is the "inverse square law"? I double my distance from a source, how does Flux change?
34) What is parallax? Why didn't the Ancient Greeks see it? What is a parsec?
35) What kind of spectrum do normal stars have? How can it be used to estimate temperature?
36) What is the sequence of spectral types, from Hottest to Coldest stars?
37) What is the Doppler Effect? Does it work for continuum sources? Why is direction important?

Reading from text book: pages 83-96, 288-318.