(Don't Use Canvas to contact me, use email link)
Office: LD 156-S, 278-9244
Class: LE 105 on Monday and Wednesday, 12:00 - 1:15
http://woodahl.physics.iupui.edu/Astro105MW
Is the University open/closed today?
Last Exam on Monday, December 11th from 12:00 PM to 1:15 PM
The Exam is NOT comprehensive (Yippee!), hence we call it "Exam 3"
Be on time, no admittance after 12:15 PM (if late, you'll earn a zero)
50 multiple-choice questions, review your notes following Exam 2 material
Rememberize to bring a #2 pencil
''.. I brought my pencil, gimme something to write on, man ..'' OpScan sheets will be provided, pick one up when you enter
The course ends after you turn-in your Exam 3, there is no final exam.
Evidence for the Big Bang Theory: Penzias and Wilson and their Microwave Antenna
Spectrum of Microwave Radiation Closely Matches Big Bang Theory
"High-Tech" Big Bang Detector in Your Home: Snowy Channel on an Antenna-Fed TV (1% is CMBR)
Gravity: Binds Objects with Mass (Motorcycle's Front Wheel Overcomes Gravity)
Electromagnetic: Binds Electrons to Protons to Form Atoms (Beryllium Atom)
Strong: Binds Quarks to Form Protons, Neutrons, and Nuclei (Helium Nucleus)
The Jets of Cygnus A (color enhanced, microwave frequencies)
Looking for Quasars and Radio Galaxies: Australia's Telescope Compact Array (ATCA)
Massive Star Collapses Forming Black Hole: Jets Along Rotation Axis Produce Gamma-Ray Long-Burst
Gamma-Ray Short-Burst: Collision Involving Neutron Stars & Black Holes
A Globular Cluster in Milky Way: Omega Centauri (NGC5139), Visible by Unaided Eye
LSS of Universe: Clusters & Superclusters that Neighbor the Milky Way (Near-Infrared Frequencies)
65 questions, multiple choice, review your notes following the Exam 1 material
Rememberize to bring a #2 pencil
''.. I brought my pencil, gimme something to write on, man ..'' OpScan sheets will be provided, pick one up when you enter
Edwin Hubble: Determined M31 Was a Galaxy 2 Million Light-Years Away
Dark Matter (Imagine that the green/yellow/orange strands are dark and you cannot see them.)
Spiral Structure of Milky Way Galaxy -- possibly a "Barred-Spiral"
Schwarzschild: Discovered Event Horizon of Black Hole (Schwarzschild Radius)
General Relativity Allows for Wormhole Solutions for Faster than Light Travel
"Back To The Past": General Relativity Allows for Wormhole Solutions for Time Travel
In no less than 1000 words, TYPED, submitted as a PDF (not Word or txt, etc.) to bwoodahl@iu.edu, explain in your own words the "Unruh Effect" and its connection to black holes. Make sure you include your full name, the due date is Friday Nov 17th at 5:00 PM.
4 questions, multiple choice, review your notes from last week's lectures and Monday's lecture
4 questions, multiple choice, review your notes from the last two lectures
An Interstellar Medium Containing Carbon Monoxide (Radio Frequencies)
Atmospheric Scattering of Light: Blue Daytime Skies and Red Dawn
65 questions, multiple choice, review all your notes
Covers all lectures
In LE 105, rememberize to bring a #2 (HB) pencil
''.. I brought my pencil, gimme something to write on, man ..'' OpScan sheets will be provided, pick one up when you enter
4 questions, multiple choice, review your notes from the last five lectures
Absolute Brightness or Luminosity Versus Apparent Brightness
Traditional H-R Diagram with the Absolute Magnitude Scale (on right-hand side)
The Red SuperGiant Betelgeuse (Hubble): Diameter is Larger than Jupiter's Orbit Around the Sun
4 questions, multiple choice, review your notes from the past two weeks
In particular for 2 of the questions, know duality of light and physicist that developed the 4 equations of EM theory
Photon (wavy line) Being Absorbed by Atom -> Electron (solid blue line) Jumps Up into Higher Orbit
Atom Emitting a Photon (wavy line) -> Electron (solid blue line) Jumps Down into Lower Orbit
Stars with Higher Surface Temperatures Emit Mostly Shorter Wavelengths
Mass Information from Doppler Shift of Spectra from a Binary Star System
4 questions, multiple choice, review your notes from the past two weeks
In particular, look over proton-proton chain and the four forces -- notably the strong and electromagnetic
James Maxwell (in 1860): Father of the Famous Maxwell Equations Governing the Behavior of Light
Niels Bohr (sitting with Einstein): Architect of Modern Theory of Atomic Physics
4 questions, multiple choice, review your notes from the last week and Monday's lectures
Know: temperature scales: Kelvin (absolute), Fahrenheit, Celsius; Galileo (first to watch sunspots -- rotation rate); multiplying large numbers; and temperature of the Sun at various locations
The 4 Fundamental Forces Occur Only at Moderately Low Temperatures
Sun's Proton-Proton Chain Fusion Reaction (4 Protons Produce Helium + Energy)
Ray Davis, 2002 Nobel Prize in Physics for the Detection of Cosmic Neutrinos During 1960's
Quarks Fundamental Particles, Three Quarks in Every Proton and Neutron
Einstein (in 1904): Speed Of Light is the "Speed Limit of Our Universe"
Visible Light is a Small Part of the Entire Electromagnetic Spectrum
Isaac Newton (in 1670): White Light Contains All the Visible Colors (Visible Frequencies)
Astronomy, the Oldest of the Sciences, 5000 Years Old: Stonehenge
Approaching Modernity: Galileo Galilei's 1610 AD Notebook Page (Who Needs Computers?)
Magnetic Field Lines "Trap" Moving Charged Particles (Thus They Spiral)
Coronal Mass Ejection (Orange Disc is Photosphere, Red Disc is Chromosphere, X-Ray Photography)
Syllabus (PDF). Please print and keep with your notes.
Master Schedule (PDF). Please print and keep with your notes.
These documents will likely change/update throughout the semester. Please check that you have the latest versions.
Check here ( http://woodahl.physics.iupui.edu/Astro105MW/ ) for the latest information regarding our particular class cancellation(s)
Weather related cancellations will be announced on this page -- Please do not email me asking if class has/will be cancelled
Many thanks to Ryan Bertram (Astro A100 student), who introduced me to this neat YouTube video (courtesy of Rob Bryanton, Canadian author) that discusses the ten possible dimensions of our universe.
Many thanks to Tim McCormick (Astro A100 student), who introduced me to this fantistic webpage that models early solar system formation.
Many thanks to Elizabeth Potter (Astro A105 MW student), who showed me this neat webpage highlighting the relative sizes from the Local Group down to Quarks (and the corresponding orders of magnitude, or powers of ten)
Department of Physics, IUPUI - Updated on November 30, 2023 at 1:35 PM EST