EOSC 310 UBC Final Study Module 1
Question and answers 100% correct
What is a light year? - correct answer ✔The distance light travels over one
year
What 2 Laws of planetary motion did Kepler discover (Galileo) - correct
answer ✔1. Planets move around the sun in an ellipse, with the sun at one
focus
2. A line joining a planet to the sun sweeps out areas in equal time as the
planet orbits the sun
What is chaos? - correct answer ✔Outcome sensitive to tiniest changes in
initial conditions or constants in the equation that long term prediction aren't
possible
What is self-similarity? - correct answer ✔Natural systems characteristic to
exhibit fractal (looks same over range of scales) behaviour
What do you need to tell the size of fractal systems? - correct answer ✔A
scale bar
Characteristics of natural systems (5) - correct answer ✔1. Always in
movement
2. Sustained by external E
3. Run by chemical transformations or cycles
4. Maintained over a narrow range of states that are far from eqb through
feedbacks
5. Often exhibit fractal behaviour of self-similarity
, What is the Dark Sky Paradox? - correct answer ✔Heinrich Olbers idea that
if the universe is infinite and at a steady state, the sky should be light
everywhere but its not.
If there's dark matter in b/w stars, would become hot and emit light.
If universe is finite, it should collapse, as galaxies on the edge would feel an
inward pull of gravity
=universe is NOT finite/static, but is expanding
What is light dispersion? - correct answer ✔The difference in velocity which
light can travel in air/glass, light refracted as enters the prism
In glass, the angle of refraction is dependant on what? - correct answer
✔The wavelength of the light
What is electromagnetic radiation? Regular radiation? - correct answer
✔Propogation of Energy involving both electric and magnetic waves
-Acts as a stream of photons where E (protons) = Placks constant (h) times
frequency
What is the Fraunhofer spectrum? - correct answer ✔Dark lines = absorption
of chemical elements in the solar atmosphere
*stars emit a continuous spectrum of radiation of different wavelengths
Cooler gas in the outer atmosphere absorbs photons with what? - correct
answer ✔Wavelengths corresponding to the transition b/w different E levels
of atoms in the gas
What did the red shift make astronomers realize? - correct answer ✔All
galaxies are moving away from us / universe is expanding
Question and answers 100% correct
What is a light year? - correct answer ✔The distance light travels over one
year
What 2 Laws of planetary motion did Kepler discover (Galileo) - correct
answer ✔1. Planets move around the sun in an ellipse, with the sun at one
focus
2. A line joining a planet to the sun sweeps out areas in equal time as the
planet orbits the sun
What is chaos? - correct answer ✔Outcome sensitive to tiniest changes in
initial conditions or constants in the equation that long term prediction aren't
possible
What is self-similarity? - correct answer ✔Natural systems characteristic to
exhibit fractal (looks same over range of scales) behaviour
What do you need to tell the size of fractal systems? - correct answer ✔A
scale bar
Characteristics of natural systems (5) - correct answer ✔1. Always in
movement
2. Sustained by external E
3. Run by chemical transformations or cycles
4. Maintained over a narrow range of states that are far from eqb through
feedbacks
5. Often exhibit fractal behaviour of self-similarity
, What is the Dark Sky Paradox? - correct answer ✔Heinrich Olbers idea that
if the universe is infinite and at a steady state, the sky should be light
everywhere but its not.
If there's dark matter in b/w stars, would become hot and emit light.
If universe is finite, it should collapse, as galaxies on the edge would feel an
inward pull of gravity
=universe is NOT finite/static, but is expanding
What is light dispersion? - correct answer ✔The difference in velocity which
light can travel in air/glass, light refracted as enters the prism
In glass, the angle of refraction is dependant on what? - correct answer
✔The wavelength of the light
What is electromagnetic radiation? Regular radiation? - correct answer
✔Propogation of Energy involving both electric and magnetic waves
-Acts as a stream of photons where E (protons) = Placks constant (h) times
frequency
What is the Fraunhofer spectrum? - correct answer ✔Dark lines = absorption
of chemical elements in the solar atmosphere
*stars emit a continuous spectrum of radiation of different wavelengths
Cooler gas in the outer atmosphere absorbs photons with what? - correct
answer ✔Wavelengths corresponding to the transition b/w different E levels
of atoms in the gas
What did the red shift make astronomers realize? - correct answer ✔All
galaxies are moving away from us / universe is expanding
