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Definition
| kenetic, radiation, matter |
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Term
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Definition
are a variation of the same thing (separation of position and distances)
Everything we observe is a form of light (visible, UV, gamma, etc.) and travel at the same speed
There are no fixed reference points in the universe |
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Definition
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| the position in space stays the same, but we move forward in time |
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Definition
at rest; the more it’s slanted the faster it will go. The fasetest it can travel is the
speed of light |
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Definition
everything that has already happened that has the possibility of affecting us
now |
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Definition
an event that took
place different points in time.
has two light cones (future and past) |
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Definition
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Definition
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Term
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Definition
the universe will continue to expand forever.
the surface of a sphere is positively curved. Drawing a triangle on a sphere the
angles will equal more than 180 degrees |
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Term
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Definition
| the universe stop expanding and collapse in on itself |
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Term
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Definition
expands to a maximum size and sits there (does not collapse)
If you draw a triangle and it equals 180 degrees |
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Term
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Definition
For each choice of expansion, there are three choices of curvature
For example “The universe is closed and flat”, that means there’s no curvature and the universe
will eventually collapse in on itself. |
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Term
| amount of energy in universe |
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Definition
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Term
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Definition
| energy of motion (applies to whatever has mass such as a proton or planet). |
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Definition
energy of motion (applies whatever doesn’t have mass such as
photons/light) |
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Term
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Definition
protons and electrons.
We need to have a lot of matter because gravity is very important |
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Term
| “Positive and closed” universe |
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Definition
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Term
| Uniform expansion redshift |
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Definition
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Term
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Definition
you can’t observe an individual particles without effecting its behavior.
The only way to find the exact location is to bounce a signal off of the proton, but its behavior
changes. |
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Term
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Definition
| as soon light pass through a small opening, it fans out |
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Term
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Definition
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Term
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Definition
number of photons produced at a given time interval
We can change the energy without changing the intensity and vice versa
We want to reduce the intensity of the light source so that at most we only have one photon at
the screen region at a time
The screen must be replaced with film to see results, and will get a interference pattern which is
strange (because it’s only one photon at a time) |
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Term
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Definition
| force between massive objects |
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Term
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Definition
| force between charged particles |
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Term
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Definition
| force between nucleons (particles in the nucleus) |
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Term
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Definition
| force between nucleons (particles in the nucleus) |
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Definition
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| premordial, stellar, and super massive |
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Term
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Definition
left over after high mass star go super nova.
3 times larger than the mass of our sun or larger. |
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Term
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Definition
(associated with quasars) formed by a quasar, the debris form spiral
galaxies.
a billion times the mass of our sun. |
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Term
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Definition
formed during the big bang.
no size limit, it can be either the mass of a grain of sand or our sun.
should be gone by now except the large ones |
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Term
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Definition
| distance from black hole where escape speed = speed of light |
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Term
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Definition
the collection of directions that will allow escape.
0 degrees at event horizon
The larger the angle of the exit cone, the less energy required to escape |
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Term
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Definition
distance from black hole where orbital speed is equal to the speed of light.
exit cone 1800 |
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Term
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Definition
A black hole that create curvature around it
Creation of virtual particle pairs. |
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Term
| Particles in hawkign radiation |
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Definition
The anti-matter particle is pulled into the black hole (separating the pair). The particle then
turns into real particles |
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Term
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Definition
| gets smaller (loses mass) when anti-matter and matter cancel each other out. |
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