Physics on Etsy!

Dodecagon to Square Puzzle

Get these and other well made disection puzzles here:

From Etsy: BUY NOW: Square Dissection Puzzles

These puzzles are expertly laser cut and sold by GamesEfce. I spray-painted the pieces of mine to better show the shapes and relationships for the video. 

Square to Dodecagon Dissection Puzzle: a square can be cut (dissected) into polygons and then reassembled into other regular polygons. Amazingly the 12-sided regular polygon can be cut into these six specific pieces that can then fit a square. Swipe to see the minimum cuts dissections for a hexagon, pentagon, and triangle.

 

Lampe Kino: Polarizing Art

The amazing art of Anne-Lise King available here:

From Etsy: BUY NOW: Kino Lamp Polarizing Art Lights

Lampe Kino: Art from from the manipulation of polarized light. These videos showcase two designs by artist Anne-Lise King, and each design can itself be displayed in numerous ways depending on the orientation of the polarizing filter and the layering of plastic imaging sheets. Light has an orientation, denoted as polarization, and a polarizing filter can be used to block certain orientations. The colors produced here come from how the molecular structure of plastics can rotate the polarization of light that passes through- light corresponding to yellows and greens gets rotated in plastic in proportion to their frequency, red and blue frequencies only a small amount. The images here are constructed with different layers of plastic to rotate the light by differing amounts. Polarizing filters are then added to allow only certain frequencies (colors) of light through.


Sphere Sticks Geometric Puzzle

Get this affordable and amazing puzzle here:

From Etsy: BUY NOW: Sphere Sticks

Sphere Sticks Puzzle: 30 identical wood pieces, each with two notches as shown, can create 12 interlocking pentagons in a perfect symmetry- look carefully and you can see that each rod is in an identical configuration with the 4 others that connect with it. Precision cut notches on the rods allow them to interlock with elastic tension such that vector sum of the 4 forces sum to zero in this tensegrity type equilibrium. The dodecahedron, with its 30 edges and 12 sides, is the basis of this puzzle sculpture. 

 

Vintage VFD Tube Clock

Fully assembeld high quality clocks available here:

From Etsy: BUY NOW: VFD Tube Clock

Vintage VFD Tube Clock: before seven segment LEDs there were Vacuum Fluorescent Display tubes in which zinc oxide coatings emit green light when bombarded by electrons under high vacuum. A phosphor coated anode segment only illuminates if it and the grid (seen in close up) are both energized at positive potential. This clock features an eight digit IV-18 display tube manufactured in the 1990s and cofigured to power up via a USB cable - old tech meets modern electronics in an elegant acrylic case. 


Single Tube Nixie Clock

This single tube version is an affordable alternative to showcase the vintage aesthetic of the Nixie neon glow:
From eBay: BUY NOW: Single Tube Nixie Clock Base (buy the tube in the next link)
From eBay: BUY NOW: IN14 Nixie Tube

Get the diffraction grating here:
From Amazon: BUY NOW: Diffraction Grating 

Get a beautifully made full four digit clock here:
From Etsy: BUY NOW: Nixie Tube Clocks 

Single Tube Nixie Clock: This minimalist clock uses a standard 5V USB connection and modern electronics to power a single Russian made ИH-14A Nixie tube- here the display shows the time 12:36 flashed in sequence. Long before there were 7 segment LED displays there was the Nixie- cold cathode tubes with a wire mesh and 10 cathodes shaped in the form of numerals 0-9 that illuminate through neon glow discharge at 170Volts. A diffraction grating reveals the brightest emission lines of the neon spectrum including: violet, green, bright yellow, and a bunch of orange/red lines characteristic of this noble has. The “Numeric Indicator eXperimental 1” or NIX 1 was introduced in 1955 by Burroughs Corporation and manufactured until the 1990s.

Vortex Pendant Marble

Get this vortex pendant here: affordable and expertly crafted!

From Etsy (Ocean Dunes Glass Art):
BUY NOW: Vortext Pendant 

More of this artform here: Vortex Marbles

Vortex Pendant Marble: A radiant spiraling illusion as a necklace by artist Karmen Trebolo- where glass art intersects with the physics of optics such that the clear glass face on these spheres acts as a convex lens giving the illusion that the spiral goes deeper than the diameter of the glass. Different kinds of dichroic glass (doped with thin layers of metals and oxides) is mixed in to the borosilicate sphere to create the intense colors. The vortex illusion lampwork art form was invented by Kevin O’Grady circa 1994- swipe to see one of his marbles that bears his signature mark on the back.

 

Ernest Borel Watch

These vintage watches are not too hard to find: 

From Etsy: BUY NOW: Borel Cocktail Watches

From eBay: BUY NOW: Borel Cocktail Watches

Moire Kinetic Watch: this beautiful timepiece is an Ernest Borel Cocktail pendant watch made in 1958 featuring the trademark rotating disk (instead of a second hand) which creates a kinetic radiant Moiré pattern. This vintage 17 jewel Swiss watch is old school- powered by a spring that must be wound once a day (elastic potential energy to kinetic). 


Soma and Rhoma Puzzles

The Rhoma Cube is a vintage item and can sometimes be found on eBay:

From eBay: Search NOW: Rhoma and Soma Puzzles

Soma Cubes are available in a wide viariety: 

From Amazon: BUY NOW: Soma Cube

From Etsy: BUY NOW: Soma Cube

SOMA and RHOMA Puzzles: Replace every cube in the Soma puzzle with a rhombohedron to create the Rhoma puzzle- where the seven slanted pieces now make a larger rhombohedron. Here I’ve painted the corresponding Soma and Rhoma pieces to match on these sister puzzles that share identical edge lengths. While there are 240 ways to make the larger cube from the 7 Soma pieces, there is only one solution for the 7 Rhoma pieces. The original Soma Cube is a math toy has an interesting connection to physics- invented by Danish scientist and artist Piet Hein who claimed that this puzzle idea came to him as he was listening to a lecture on Quantum Mechanics by Werner Heisenberg in 1933. The seven pieces are all the ways 3 or 4 cubes can be joined, such that each piece has at least one inside corner.

Impossible Bottle with Arrow

Get an impossibe object from this artist here:

From Etsy: BUY NOW: Impossible Bottles and Objects

Impossible Bottle with Arrow Sculpture Puzzle: a new seemingly impossible object in my collection- Created with clever engineering, this “impossible” syrup bottle contains a wooden arrow that should not fit through its neck. The wood of the arrow is notably one uncut piece, and yet a metal washer is also somehow trapped on the shaft of the arrow. The puzzle aspect is to consider how the bottle was produced (I personally have some theories- but I do not know the secrets of this artist). I can tell you with high certainty that the bottle was never cut or altered in anyway, and it was not somehow formed around the objects. This bottle by Brad Byers is an expertly crated example of the impossible object genre.

Half Seirpinski Octahedron Fractal

Get this amazing 3D print here:
From Etsy: BUY NOW: Seirpinski Pyramid

or print it yourself:
From Thingverse: Seirpinski Pyramid

Half Sierpinski Octahedron Fractal: this 3D printed math sculpture is one half of the sixth iteration of what is called “the octahedron flake” a 3D fractal based on the Sierpinski triangle. To make this fractal, on each iteration an inverted triangle is removed from the center of the previous triangle, and if this process is repeated indefinitely one gets the famous fractal. This 3D print used rainbow silk PLA to create the beautiful color gradient base on the .stl files by Rick Tu. Another example of math brought to life via 3D printing! 

 


Tesla’s Egg of Columbus

PhiTOPs are available in Aluminum and Brass: 
From Etsy: BUY NOW PhiTOP in Brass 
From EI: BUY NOW PhiTOP in Aluminum 

Click here for more on the PhiTOP and using magnetic induction to spin it up. 

Tesla’s Egg of Columbus: a copper ellipsoid egg (PhiTOP) mysteriously spins and stands upright in this modern version of Tesla’s famous demonstration from the 1893 World’s Fair in Chicago that first showcased the principles behind wireless power transfer and his AC induction motor. Rotating magnetic fields from under the wooden platform induce electric eddy currents to flow in the copper PhiTOP- these currents then create their own magnetic field which oppose the initial fields underneath and pushes the PhiTOP to spin. This version differs from Tesla’s in that the rotating magnetic fields are created by, well, a pair of rotating neodymium magnets (revealed by lifting the top platform in this model). Credit to astrophysicist Kenneth Brecher, the creator of the PhiTOP, and this unique means of using a common lab magnetic stirrer to create the induced currents. Finally, the ellipsoid top stands up vertically (when spun with sufficient rotational velocity) due to physics similar to that of the tippe-top. 

Floating Yen

Aluminium 1 Yen coins are the perfect denisty to float as shown in the video:

From Etsy: BUY NOW: 1-Yen Coins

Floating Yen: the surface tension of water is strong enough to suspend the aluminum coin, and a trapped column of air in a second glass can submerge a portion of the surface with the coin. The 1-Yen coin has just the right mass and density for this demonstration. One of my favorite DIY physics demonstrations.

Dudeney's Dissection 3D Print

Get this set here!

From Etsy: BUY NOW: Dudeney's Dissection 3D Print

Dudeney's Dissection: an equilateral triangle canbe cut (dissected) into four pieces that will then assemble into a square. This 3D printed version comes as a puzzle- fit the pieces in each of two containers- a square and a triangle, which also makes it clear the two supplied shapes are of equal area. Fun fact: It is not known if a similar three piece dissection is possible. Also called Haberdasher's problem and described in 1907 by Henry Dudeney it is the only 4 piece solution known.


Impossible Trapped 8-Ball

Get this amazing object here:

From Etsy: BUY NOW: Trapped 8-Ball

Trapped 8-Ball: one more addition to my “impossible object”collection- a solid wooden frame contains an 8-ball which is too large to fit through any of the holes. The puzzle aspect is to consider how the ball was somehow inserted (as usual I personally have some theories- but I do not know the secrets of this artist). I can tell you with high certainty that the frame was fabricated from a single piece of wood, and once made, never cut or glued in anyway. A creation by artist/maker Troy Hawkins. 

 

 

 

Hexa Sphericon

3D printed as well as handmade sphericons and similar shapes avaiable here:
From Etsy: BUY NOW: Sphericons 

Sphericon and Hexa-sphericon: beautiful works of art in metal- available here!
From the Matter Collection: BUY NOW The Sphericon (Hex and Regular) 

Hexa-Sphericon: Sphericons are unique solids that roll in such a way that every point on their surface comes in contact with the plane- following the path shown here with white paper. Solids from the sphericon family all have one side and two edges. Each sphericon is based on a regular polygon, with the basic sphericon derived from a square, and here- a more interesting case with more complex rolling motion- from a hexagon. 

Giant Newton's Cradle

This industrial grade museum quality device available here:
From Etsy: BUY NOW: Giant Newton's Cradle

Regular sized Newton's cradles availabe here:
From Amazon: BUY NOW: Newton's Cradle

Newton's Cradle: industrial model made with galvanized aircraft cable, aircraft aluminum for the frame, and 1.5 inch one-half pound nickel plated chrome steel spheres. (0.23 kg and 3.8cm in diameter each) The classic demonstration that shows the curious behavior due to conservation of both momentum and kinetic energy. Swipe to see comparison to standard version.