Cosmology
PIRA classification 8C
8C10. Models of the Universe
PIRA # |
Demonstration Name |
Subsets |
Abstract |
8C10.05 |
Cosmological Models |
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A discussion of Red Shift, unbound universe, and other factors, and how they are applied to comological models. See The Physics Teacher - TPT 18(9), 639 |
8C10.10 |
The Big Bang |
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The Big Bang and chirality of the universe. See The Physics Teacher - TPT 38(9), 564 |
8C10.20 |
Cosmic Microwave Background |
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The study of anisotropies in the CMB. See American Journal of Physics - AJP 70(2), 106 |
8C10.25 |
Steady State, Expanding, or Contracting Universe |
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The general Doppler formula in a nonstatic universe is derived. See American Journal of Physics - AJP 45(7), 642 |
8C10.25 |
Steady State, Expanding, or Contracting Universe |
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A look at the question " Is the universe open or closed"? See The Physics Teacher - TPT 16(3), 137 |
8C10.30 |
Expanding Universe |
pira200 |
Pull a rubber hose threaded through five large styrofoam balls at even intervals and pull to watch the expanding intervals. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.10] |
8C10.30 |
Expanding Universe |
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Pull on a rubber rope with "galaxies" attached. See American Journal of Physics - AJP 50(6),571 |
8C10.30 |
Expanding Universe |
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Using a strip of latex to model how long a light pulse would take to travel from one galaxy to another in an expanding universe. See American Journal of Physics - AJP 69(2), 125 |
8C10.30 |
Expanding Universe |
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Use transparencies of a sample universe on the overhead to show center of expansion in an expanding universe. See The Physics Teacher - TPT 29(2), 103 |
8C10.35 |
Inflating Balloon |
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A balloon with galaxies drawn on is blown up with compressed air. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.15] |
8C10.37 |
Expanding Universe on a White Board |
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8C10.39 |
Expanding Universe |
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Are we able to use experimantal evidence to calculate the total vector momentum of our expanding universe. Is it zero? See The Physics Teacher - TPT 20(9), 617 |
8C10.40 |
Bubble Universe |
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Use a straw to blow bubbles in liquid soap. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.20] |
8C10.50 |
Galaxy Model |
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Show a 16" diameter galaxy model. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.30] |
8C10.55 |
View of Galactic Center |
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8C10.60 |
Spiral Galaxies |
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8C10.70 |
Radio Galaxies |
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8C10.80 |
One Million Galaxies |
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A poster showing 1 million galaxies taken at radio wavelengths. |
8C20. Gravitational Effects
PIRA # |
Demonstration Name |
Subsets |
Abstract |
8C20.10 |
Klein Bottle |
|
A Klein bottle has been made from a 20 L flask. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.40] |
8C20.20 |
Moebius Strip |
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A strip of aluminum about six inches wide and six feet long is made into a Moebius strip. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.45] |
8C20.30 |
Saddle Shape |
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A ball is not stable when placed on a saddle shape, but surprisingly does become stable if the saddle shape is rotated. See American Journal of Physics - AJP 63(2), 186 |
8C20.30 |
Saddle Shape |
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A butternut squash provides a negative space over small distances. At large distances the space becomes positive. A hubbard squash has a positive space. See The Physics Teacher - TPT 15(5), 298 |
8C20.30 |
Saddle Shape |
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Two models of a negatively curved two-dimensional space. One of fiberglass, and one made with strings. See The Physics Teacher - TPT 33(5), 286 |
8C20.30 |
Saddle Shape |
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Two more examples. A hollowed out grapefruit is a positive space. Pringles potato chips are examples of negative space. See The Physics Teacher - TPT 16(1), 8 |
8C20.35 |
Non-Euclidean Geometry |
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A discussion of gravity touching on non-Euclidean geometry and the geometry of three dimensional space. See The Physics Teacher - TPT 22(9), 557 |
8C20.35 |
Non-Euclidean Geometry |
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A helpful discussion about space curvature and how to visualize it. See The Physics Teacher - TPT 29(3), 147 |
8C20.35 |
Non-Euclidean Geometry |
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Counting distant radio sources to determine if the overall curvature of space is positively curved, flat, or negatively curved. See The Physics Teacher - TPT 30(2), 92 |
8C20.40 |
Gravitational Lens |
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A machined Plexiglas lens bends light like a black hole. See University of Minnesota Handbook - 8C20.40 |
8C20.40 |
Gravitational Lenses |
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A computer program to visualize gravitational lenses. See American Journal of Physics - AJP 69(2), 218 |
8C20.40 |
Gravitational Lens |
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An equation is developed for constructing a Plexiglas lens. See American Journal of Physics - AJP 48(10),883 |
8C20.40 |
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Directions for constructing a gravitational lens simulator from Plexiglas. Ref: Phys.Rev. 133, B835 (1964). See American Journal of Physics - AJP 37(1),103 |
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8C20.40 |
Gravitational Lens |
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A plastic lens that bends light the same way a black hole does. Theory and directions for construction of a lens. See American Journal of Physics - AJP 49(7),652 |
8C20.40 |
Gravitational Lens |
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Viewing a fish in a fish tank. Refraction of light as the optical counterpart of a gravitational lens. See The Physics Teacher - TPT 25(7), 440 |
8C20.40 |
Gravitational Lens |
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Constructions of a simple gravitational lens demonstration. See The Physics Teacher - TPT 34(9), 555 |
8C20.42 |
Gravitational Lens |
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Henry Cavendish and Johann von Soldner calculated that light would be deflected by gravitational bodies long before Einstein. See American Journal of Physics - AJP 56(5), 413 |
8C20.42 |
Gravitational Lens |
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How would the outer world look from an observer located in a gravitational lens. See American Journal of Physics - AJP 55(4), 336 |
8C20.42 |
Gravitational Lens |
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The principle of equivalence and the deflection of light by the Sun. See American Journal of Physics - AJP 46(8), 801 |
8C20.42 |
Gravitational Lens |
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The prediction and test of Einstein's 1916 prediction. See The Physics Teacher - TPT 38(9), 524 |
8C20.42 |
Gravitational Lens |
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Additional comments on TPT 38(9), 524. See The Physics Teacher - TPT 39(4), 198 |
8C20.43 |
Gravitational Lens |
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The black hole as a gravitational lens. See American Journal of Physics - AJP 55(5), 428 |
8C20.45 |
Galactic Lens |
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A machined Plexiglas lens bends light like an extended mass distribution. See American Journal of Physics - AJP 51(9),860 |
8C20.50 |
Gravitational Waves |
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Icebreaker activities to use when introducing the subject of gravitational waves. See The Physics Teacher - TPT 44(7), 416 |
8C20.50 |
Gravitational Waves |
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About the new generation of gravitational wave detectors. See The Physics Teacher - TPT 44(7), 420 |
8C20.50 |
Gravitational Waves |
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On the detection of gravitational waves. See The Physics Teacher - TPT 22(5), 282 |
8C20.60 |
Quasars |
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The use of quasars in teaching introductory special relativity. See American Journal of Physics - AJP 55(3), 214 |
8C20.60 |
Quasars |
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Quasars and superluminal velocities in astronomy. See The Physics Teacher - TPT 34(8), 496 |
8C20.70 |
Cosmic Strings |
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8C20.80 |
Dark Matter |
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