Mystery Orbiter UFO: hidden within this flying saucer shaped toy is a gyroscope, allowing it to balance at seemingly impossible angles, and causing it to precess around an axis through the contact point. The physics and vector nature of angular momentum! Blowing air through one of the three holes spins this gyroscope up.
Samples available here:
From eBay: BUY NOW Silica Aerogel Sample
Silica Aerogel: a solid with extremely low density. Light as a feather, a bent post-it note can support the weight of this chunk. Used as insulation and for catching the tails of comets (see NASA Stardust mission).
This metal version is available here:
From KJ Beckett: Metal Rattleback
Stainless Steel Rattleback: prefers to spin counter clockwise. If spun clockwise, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into rattling (energy of oscillations) and then into rotational energy in the opposite direction! This behavior is related to the asymmetric shape of the bottom of this kind of rattleback, it's somewhat propeller shaped with an "S" curve along the bottom ridge.
This vintage hologram is currently available on eBay in limited quantities:
From eBay: BUY NOW Microscope Hologram
Microscope Hologram: This photopolymer hologram is so realistic one can look through the eyepiece! ?Using a halogen bulb as a point light source the microscope in this vintage 1980s reflective hologram pops from the page with stunning detail- and with the eye positioned just right one can see the magnified image of a small insect. Unlike photographs, holograms are recordings of the interference pattern of light waves. This interference pattern can encode moving 3D images which are revealed by illumination by a point source of light and viewing from an appropriate angle. My favorite hologram in my collection, and it looks even more stunning in person!
Moiré Kinetic Art: Entitled “Stream 2” this elegant work by Shelley James creates motion animation from Moiré pattern effects of constructive and deconstructive interference. Constructed from screen printed low-iron glass and paper, the bands appear in motion as one moves across the room in relation to the frame, and the size of the bands depend on how close the artwork one is.
Get the Mind Games kit with 15+ amazing items including a balance bird and a rattleback!
From Quirkology: BUY NOW Mind Games Set
Also available here:
From Amazon: BUY NOW Mind Games Set
From eBay: BUY NOW Mind Games Set
Perspective Anamorphosis: oblique graphical projection creates a wonderful 3D illusion, implemented here with color printing and cutout card-stock. This illusion is part of the Mind Games set of illusions, physics toys, and psychological toys. Special thanks to Prof. Richard Wiseman, creator of Quirkology, for sending me this set!
Trichroic Beam Splitter: this cube of four prisms with dichroic optical coatings allows a beam of white light to be separated into red, green, and blue. Used in multi-element CCD array cameras and other optical instruments. Another amazing item from the product line of @mrscisciencefactory
Eames Era Kinetic Art: a spray of harmonic oscillators (masses on spring steel wire) produce hypnotic motion in this vintage art piece from the early 1970s. Kinetic sprays like this are mostly from designer Laurids Lonborg of Denmark and can also serve as earthquake detectors. Not recommended for households with cats!
Magni-Orb: kinetic art as oscillations about a magnetic equilibrium point. The base and sphere are carved from rosewood and have strong magnets embedded within them that produce an attraction. If the sphere is given some initial rotation it will exhibit complex orbits as the energy trades back and forth between potential energy and kinetic energy. The motion eventually damps out due to friction. A creation by Sven Petersen and imported by SAAP Denmark circa 1970.
These are still in production and come in various sizes and colors:
From Amazon: BUY NOW Hoberman Spheres
Hoberman Sphere: isokinetic structure. This special assembly of foldable linkages consisting of rigid bars and simple hinges is kinematically over constrained- motion can only occur along the radial direction and the movement of any hinge creates motion in all the joints. The engineering and physics behind deployable space structures!
Get one here:
From Amazon: BUY NOW NeoLev Hoverboard
Diamagnetic Mini Hoverboard: in this commercially available version a thin pyrolytic graphite sheet floats above a concave powerful neodymium magnet creating an environment with minimal friction- the thin sheet carrying a lightweight foam Hoverboard will swing back and forth for a couple minutes. By NeoLev- with a Back to the Future II theme! Diamagnetic substances develop temporary repulsive magnetic fields only when they are exposed to a magnetic field from another source. Graphite of this sort is the most diamagnetic substance known.
CFL Color Change Glass: this filigree pendent appears green, violet, dark green, and yellow under incandescent light, and clear, blue, purple, and pink under fluorescent light. Special pigments in the glass selectively absorb some frequencies of light while transmitting others, very similar to the color change properties of the gemstone alexandrite. The emission spectrum of a fluorescent lightbulb (a CFL bulb for this video) is deficient in the higher frequencies of the visible spectrum as compared to an incandescent bulb, so the selective absorption by the chemicals in the glass has a dramatic effect on what the eye perceives. Many types of CFL reactive glass, with a variety of color shifts, are now available on the market and go by brand names such as Serum, Potion, and Gemini (all used here) involving oxides of metals such as neodymium (purple/light blue) and holmium (yellow/pink). Thanks to @swanglass for creating this pendant of multiple CFL glass types for my collection.
From Rail and Oak: the Esty shop of Logan Needham
From Etsy: BUY NOW Planetary Gear System
Planetary Gear Train: with non-circular gears! This piece of kinetic art features a 6-sided Sun Gear, six 3-sided Planetary Gears, all held within the 12-sided space of the Annular Gear. The video captures three of the many interesting modes of these epicylic gear systems: 1) holding the sun gear fixed while rotating the annular gear allows the planetary gears to orbit, 2) pinning the planetary gears such that they can spin (but not orbit) allows the sun gear to go in the reverse direction of the annular gear, 3) holding one planetary gear fixed produces curious motion- note that although the other planetary gears move they do not spin about their axes! Situation 2) is how reverse gear is accomplished in the transmissions of many vehicles. Thanks to Logan Needham (@pillagethenburn) for the ingenuous display stand that allows full demonstration of this work of physics and engineering art.
Get one here:
From Amazon: BUY NOW Dolphin Timer
Oil Drop Timer with Dolphins: immiscible fluids of different densities stay separate under gravity with the lightest density on top. The density of the plastic dolphins is greater than the density of the top fluid but less than the density of the bottom fluid, so they stay at the boundary in equilibrium. The dolphins have a metal weight in their tails so that the buoyant force will keep them upright even as the liquids trade places (2 minutes shown in time-lapse). Archimedes' Principal at work here at multiple levels.
Similar art glass available here:
From Etsy: BUY NOW Vortex Marbles
Vortex Marble with Gilson Opal Sphere: glass art intersects with the physics of optics in this spectacular piece from lampworking master Raven Copeland aka @madglasser -The clear glass face acts as a convex lens giving the illusion that the spiral goes deeper than the diameter of the marble. The illusion is even stronger in person and I'm still trying to figure out how Raven produces the amazing 3-D background features.
These are available on eBay!
From Ebay: BUY NOW Star Trek Rainbow Hologram
Benton Hologram: also called a rainbow hologram which are often embossed on foil as means of production. Commonly found on credit cards and forms of currency as a method of anti-counterfeit security, this hologram of the Starship Enterprise is an especially nice example of this hologram type with striking 3D effect. Here the motion is produced by moving the point source of illumination (a halogen lamp). Amazing what manipulation of light interference can create!
Get one here:
From Amazon: BUY NOW Balance Bottle Dock
Balancing Bottles: serve with physics style this season displaying this design where the combined center of mass of the wine rack and two bottles is directly above the base of the wood rack- because sometimes it takes two bottles of wine to bring life into balance! ??