Differences between revisions 7 and 8
⇤ ← Revision 7 as of 2016-06-10 22:57:30 →
Size: 9405
Editor: JamesReardon
Comment:
← Revision 8 as of 2018-07-19 17:30:12 → ⇥
Size: 9851
Editor: srnarf
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
||<25% style="text-align:center">[[PiraScheme#Astronomy|Table of Astronomy]] ||<25% style="text-align:center">[[StellarAstronomy|Astronomy(8B):Stellar Astronomy]] ||<25% style="text-align:center">[[MiscAstronomy|Astronomy(8D):Miscellaneous Astronomy]] ||<25% style="text-align:center">[[Demonstrations|Lecture Demonstrations]] || ||<25% style="&quot;text-align:center&quot; ">[[PiraScheme#Astronomy|Table of Astronomy]] ||<25% style="&quot;text-align:center&quot; ">[[StellarAstronomy|Astronomy(8B):Stellar Astronomy]] ||<25% style="&quot;text-align:center&quot; ">[[MiscAstronomy|Astronomy(8D):Miscellaneous Astronomy]] ||<25% style="&quot;text-align:center&quot; ">[[Demonstrations|Lecture Demonstrations]] ||
Line 9: Line 9:
||<10% style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<60% style="text-align:center">'''Abstract''' ||
||8C10.05 ||Cosmological Models ||A discussion of Red Shift, unbound universe, and other factors, and how they are applied to comological models. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 18(9), 639]] ||
||8C10.10 ||The Big Bang ||The Big Bang and chirality of the universe. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 38(9), 564]] ||
||8C10.20 ||Cosmic Microwave Background ||The study of anisotropies in the CMB. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 70(2), 106]] ||
||8C10.25 ||Steady State, Expanding, or Contracting Universe ||The general Doppler formula in a nonstatic universe is derived. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 45(7), 642]] ||
||8C10.25 ||Steady State, Expanding, or Contracting Universe ||A look at the question " Is the universe open or closed"? See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 16(3), 137]] ||
||8C10.30 ||Expanding Universe ||Pull a rubber hose threaded through five large styrofoam balls. See [ http://groups.physics.umn.edu/demo/old_page/astronomy.html University of Minnesota Handbook - 8C10.10] ||
||8C10.30 ||Expanding Universe ||Pull on a rubber rope with "galaxies" attached. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 50(6),571]] ||
||8C10.30 ||Expanding Universe ||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 [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 69(2), 125]] ||
||8C10.30 ||Expanding Universe ||Use transparencies of a sample universe on the overhead to show center of expansion in an expanding universe. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 29(2), 103]] ||
||8C10.35 ||Inflating Balloon ||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 || ||
||8C10.39 ||Expanding Universe ||Are we able to use experimantal evidence to calculate the total vector momentum of our expanding universe. Is it zero? See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 20(9), 617]] ||
||8C10.40 ||Bubble Universe ||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 ||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 || ||
||8C10.60 ||Spiral Galaxies || ||
||8C10.70 ||Radio Galaxies || ||
||8C10.80 ||One Million Galaxies ||A poster showing 1 million galaxies taken at radio wavelengths. ||		 ||<10% style="&quot;text-align:center&quot; ">'''PIRA #''' ||<style="&quot;text-align:center&quot;">'''Demonstration Name''' ||<style="&quot;text-align:center&quot;">'''Subsets'''||<60% style="&quot;text-align:center&quot; ">'''Abstract''' ||
||8C10.05 ||Cosmological Models || ||A discussion of Red Shift, unbound universe, and other factors, and how they are applied to comological models. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 18(9), 639]] ||
||8C10.10 ||The Big Bang || ||The Big Bang and chirality of the universe. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 38(9), 564]] ||
||8C10.20 ||Cosmic Microwave Background || ||The study of anisotropies in the CMB. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 70(2), 106]] ||
||8C10.25 ||Steady State, Expanding, or Contracting Universe || ||The general Doppler formula in a nonstatic universe is derived. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 45(7), 642]] ||
||8C10.25 ||Steady State, Expanding, or Contracting Universe || ||A look at the question " Is the universe open or closed"? See [[http://scitation.aip.org/tpt/|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 || ||Pull on a rubber rope with "galaxies" attached. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 50(6),571]] ||
||8C10.30 ||Expanding Universe || ||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 [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 69(2), 125]] ||
||8C10.30 ||Expanding Universe || ||Use transparencies of a sample universe on the overhead to show center of expansion in an expanding universe. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 29(2), 103]] ||
||8C10.35 ||Inflating Balloon || ||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 || || ||
||8C10.39 ||Expanding Universe || ||Are we able to use experimantal evidence to calculate the total vector momentum of our expanding universe. Is it zero? See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 20(9), 617]] ||
||8C10.40 ||Bubble Universe || ||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 || ||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 || || ||
||8C10.60 ||Spiral Galaxies || || ||
||8C10.70 ||Radio Galaxies || || ||
||8C10.80 ||One Million Galaxies || ||A poster showing 1 million galaxies taken at radio wavelengths. ||
Line 31: Line 31:
||<10% style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<60% style="text-align:center">'''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 ||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 ||A ball is not stable when placed on a saddle shape, but surprisingly does become stable if the saddle shape is rotated. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 63(2), 186]] ||
||8C20.30 ||Saddle Shape ||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 [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 15(5), 298]] ||
||8C20.30 ||Saddle Shape ||Two models of a negatively curved two-dimensional space. One of fiberglass, and one made with strings. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 33(5), 286]] ||
||8C20.30 ||Saddle Shape ||Two more examples. A hollowed out grapefruit is a positive space. Pringles potato chips are examples of negative space. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 16(1), 8]] ||
||8C20.35 ||Non-Euclidean Geometry ||A discussion of gravity touching on non-Euclidean geometry and the geometry of three dimensional space. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 22(9), 557]] ||
||8C20.35 ||Non-Euclidean Geometry ||A helpful discussion about space curvature and how to visualize it. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 29(3), 147]] ||
||8C20.35 ||Non-Euclidean Geometry ||Counting distant radio sources to determine if the overall curvature of space is positively curved, flat, or negatively curved. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 30(2), 92]] ||
||8C20.40 ||Gravitational Lens ||A machined Plexiglas lens bends light like a black hole. See [[http://groups.physics.umn.edu/demo/old_page/astronomy.html|University of Minnesota Handbook - 8C20.40]] ||
||8C20.40 ||Gravitational Lenses ||A computer program to visualize gravitational lenses. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 69(2), 218]] ||
||8C20.40 ||Gravitational Lens ||An equation is developed for constructing a Plexiglas lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 48(10),883]] ||
||8C20.40 ||[[GravitationalLens|Gravitational Lens]] ||Directions for constructing a gravitational lens simulator from Plexiglas. Ref: Phys.Rev. 133, B835 (1964). See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 37(1),103]] ||
||8C20.40 ||Gravitational Lens ||A plastic lens that bends light the same way a black hole does. Theory and directions for construction of a lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 49(7),652]] ||
||8C20.40 ||Gravitational Lens ||Viewing a fish in a fish tank. Refraction of light as the optical counterpart of a gravitational lens. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 25(7), 440]] ||
||8C20.40 ||Gravitational Lens ||Constructions of a simple gravitational lens demonstration. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 34(9), 555]] ||
||8C20.42 ||Gravitational Lens ||Henry Cavendish and Johann von Soldner calculated that light would be deflected by gravitational bodies long before Einstein. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 56(5), 413]] ||
||8C20.42 ||Gravitational Lens ||How would the outer world look from an observer located in a gravitational lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 55(4), 336]] ||
||8C20.42 ||Gravitational Lens ||The principle of equivalence and the deflection of light by the Sun. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 46(8), 801]] ||
||8C20.42 ||Gravitational Lens ||The prediction and test of Einstein's 1916 prediction. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 38(9), 524]] ||
||8C20.42 ||Gravitational Lens ||Additional comments on TPT 38(9), 524. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 39(4), 198]] ||
||8C20.43 ||Gravitational Lens ||The black hole as a gravitational lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 55(5), 428]] ||
||8C20.45 ||Galactic Lens ||A machined Plexiglas lens bends light like an extended mass distribution. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 51(9),860]] ||
||8C20.50 ||Gravitational Waves ||Icebreaker activities to use when introducing the subject of gravitational waves. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 44(7), 416]] ||
||8C20.50 ||Gravitational Waves ||About the new generation of gravitational wave detectors. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 44(7), 420]] ||
||8C20.50 ||Gravitational Waves ||On the detection of gravitational waves. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 22(5), 282]] ||
||8C20.60 ||Quasars ||The use of quasars in teaching introductory special relativity. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 55(3), 214]] ||
||8C20.60 ||Quasars ||Quasars and superluminal velocities in astronomy. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 34(8), 496]] ||
||8C20.70 ||Cosmic Strings || ||
||8C20.80 ||Dark Matter || ||		 ||<10% style="&quot;text-align:center&quot; ">'''PIRA #''' ||<style="&quot;text-align:center&quot;">'''Demonstration Name''' ||<style="&quot;text-align:center&quot;">'''Subsets'''||<60% style="&quot;text-align:center&quot; ">'''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 || ||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 || ||A ball is not stable when placed on a saddle shape, but surprisingly does become stable if the saddle shape is rotated. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 63(2), 186]] ||
||8C20.30 ||Saddle Shape || ||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 [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 15(5), 298]] ||
||8C20.30 ||Saddle Shape || ||Two models of a negatively curved two-dimensional space. One of fiberglass, and one made with strings. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 33(5), 286]] ||
||8C20.30 ||Saddle Shape || ||Two more examples. A hollowed out grapefruit is a positive space. Pringles potato chips are examples of negative space. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 16(1), 8]] ||
||8C20.35 ||Non-Euclidean Geometry || ||A discussion of gravity touching on non-Euclidean geometry and the geometry of three dimensional space. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 22(9), 557]] ||
||8C20.35 ||Non-Euclidean Geometry || ||A helpful discussion about space curvature and how to visualize it. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 29(3), 147]] ||
||8C20.35 ||Non-Euclidean Geometry || ||Counting distant radio sources to determine if the overall curvature of space is positively curved, flat, or negatively curved. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 30(2), 92]] ||
||8C20.40 ||Gravitational Lens || ||A machined Plexiglas lens bends light like a black hole. See [[http://groups.physics.umn.edu/demo/old_page/astronomy.html|University of Minnesota Handbook - 8C20.40]] ||
||8C20.40 ||Gravitational Lenses || ||A computer program to visualize gravitational lenses. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 69(2), 218]] ||
||8C20.40 ||Gravitational Lens || ||An equation is developed for constructing a Plexiglas lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 48(10),883]] ||
||8C20.40 ||[[GravitationalLens|Gravitational Lens]] || ||Directions for constructing a gravitational lens simulator from Plexiglas. Ref: Phys.Rev. 133, B835 (1964). See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 37(1),103]] ||
||8C20.40 ||Gravitational Lens || ||A plastic lens that bends light the same way a black hole does. Theory and directions for construction of a lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 49(7),652]] ||
||8C20.40 ||Gravitational Lens || ||Viewing a fish in a fish tank. Refraction of light as the optical counterpart of a gravitational lens. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 25(7), 440]] ||
||8C20.40 ||Gravitational Lens || ||Constructions of a simple gravitational lens demonstration. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 34(9), 555]] ||
||8C20.42 ||Gravitational Lens || ||Henry Cavendish and Johann von Soldner calculated that light would be deflected by gravitational bodies long before Einstein. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 56(5), 413]] ||
||8C20.42 ||Gravitational Lens || ||How would the outer world look from an observer located in a gravitational lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 55(4), 336]] ||
||8C20.42 ||Gravitational Lens || ||The principle of equivalence and the deflection of light by the Sun. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 46(8), 801]] ||
||8C20.42 ||Gravitational Lens || ||The prediction and test of Einstein's 1916 prediction. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 38(9), 524]] ||
||8C20.42 ||Gravitational Lens || ||Additional comments on TPT 38(9), 524. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 39(4), 198]] ||
||8C20.43 ||Gravitational Lens || ||The black hole as a gravitational lens. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 55(5), 428]] ||
||8C20.45 ||Galactic Lens || ||A machined Plexiglas lens bends light like an extended mass distribution. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 51(9),860]] ||
||8C20.50 ||Gravitational Waves || ||Icebreaker activities to use when introducing the subject of gravitational waves. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 44(7), 416]] ||
||8C20.50 ||Gravitational Waves || ||About the new generation of gravitational wave detectors. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 44(7), 420]] ||
||8C20.50 ||Gravitational Waves || ||On the detection of gravitational waves. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 22(5), 282]] ||
||8C20.60 ||Quasars || ||The use of quasars in teaching introductory special relativity. See [[http://scitation.aip.org/ajp/|American Journal of Physics - AJP 55(3), 214]] ||
||8C20.60 ||Quasars || ||Quasars and superluminal velocities in astronomy. See [[http://scitation.aip.org/tpt/|The Physics Teacher - TPT 34(8), 496]] ||
||8C20.70 ||Cosmic Strings || || ||
||8C20.80 ||Dark Matter || || ||

Table of Astronomy

Astronomy(8B):Stellar Astronomy

Astronomy(8D):Miscellaneous Astronomy

Lecture Demonstrations

Cosmology

PIRA classification 8C

8C10. Models of the Universe

PIRA #

Demonstration Name

Subsets

Abstract

8C10.05

Cosmological Models

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

The Big Bang and chirality of the universe. See The Physics Teacher - TPT 38(9), 564

8C10.20

Cosmic Microwave Background

The study of anisotropies in the CMB. See American Journal of Physics - AJP 70(2), 106

8C10.25

Steady State, Expanding, or Contracting Universe

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

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

Pull on a rubber rope with "galaxies" attached. See American Journal of Physics - AJP 50(6),571

8C10.30

Expanding Universe

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

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

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

8C10.39

Expanding Universe

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

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

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

8C10.60

Spiral Galaxies

8C10.70

Radio Galaxies

8C10.80

One Million Galaxies

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

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

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

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

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

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

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

A helpful discussion about space curvature and how to visualize it. See The Physics Teacher - TPT 29(3), 147

8C20.35

Non-Euclidean Geometry

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

A machined Plexiglas lens bends light like a black hole. See University of Minnesota Handbook - 8C20.40

8C20.40

Gravitational Lenses

A computer program to visualize gravitational lenses. See American Journal of Physics - AJP 69(2), 218

8C20.40

Gravitational Lens

An equation is developed for constructing a Plexiglas lens. See American Journal of Physics - AJP 48(10),883

8C20.40

Gravitational Lens

Directions for constructing a gravitational lens simulator from Plexiglas. Ref: Phys.Rev. 133, B835 (1964). See American Journal of Physics - AJP 37(1),103

8C20.40

Gravitational Lens

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

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

Constructions of a simple gravitational lens demonstration. See The Physics Teacher - TPT 34(9), 555

8C20.42

Gravitational Lens

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

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

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

The prediction and test of Einstein's 1916 prediction. See The Physics Teacher - TPT 38(9), 524

8C20.42

Gravitational Lens

Additional comments on TPT 38(9), 524. See The Physics Teacher - TPT 39(4), 198

8C20.43

Gravitational Lens

The black hole as a gravitational lens. See American Journal of Physics - AJP 55(5), 428

8C20.45

Galactic Lens

A machined Plexiglas lens bends light like an extended mass distribution. See American Journal of Physics - AJP 51(9),860

8C20.50

Gravitational Waves

Icebreaker activities to use when introducing the subject of gravitational waves. See The Physics Teacher - TPT 44(7), 416

8C20.50

Gravitational Waves

About the new generation of gravitational wave detectors. See The Physics Teacher - TPT 44(7), 420

8C20.50

Gravitational Waves

On the detection of gravitational waves. See The Physics Teacher - TPT 22(5), 282

8C20.60

Quasars

The use of quasars in teaching introductory special relativity. See American Journal of Physics - AJP 55(3), 214

8C20.60

Quasars

Quasars and superluminal velocities in astronomy. See The Physics Teacher - TPT 34(8), 496

8C20.70

Cosmic Strings

8C20.80

Dark Matter

Demonstrations

Home

fw: Cosmology (last edited 2018-07-19 17:30:12 by srnarf)