All physicsfun toys

Ambiguous Object Illusion Mug

From Etsy: BUY NOW Squirkle Mug Ambiguous Object Illusion 

These type of objects were invented by mathematician Kokichi Sugihara, and you can buy his books here: 
From Amazon: BUY NOW Ambiguous Objects by Kokichi Sugihara 
The math and physics are described here in this technical journal article by Prof. Sugihara

Ambiguous Object Illusion Mug: circle or a square? It’s all a matter of perspective and viewing angle. The complex shape allows for both to be perceived and is based on the work of mathematician Kokichi Sugihara of Meiji University in Japan, the inventor of this illusion and art form. 

Big Dipper 3D Sculpture

Get this amazing and informative sculpture here:

From Etsy: BUY NOW: Big Dipper 3D Sculpture

Asterism in a Box: Swarovski pearls, suspended by nylon lines in a specific spatial orientation, represent seven well known stars in the Northern night sky. The pearls in this sculpture show the actual 3D configuration of the stars that make up the Big Dipper! Only from one particular point of view- that of our sun- do they look like the "dipper", and this sculpture shows what this cluster of stars would look like from other “near by” star systems in our galaxy. Note that large pearl in the bottom right represents the star Dubhe, a blue giant some 326 times brighter than the sun and the farthest of the Dipper stars at 123 lightyears away. The rest of the stars range in distance from 58 to 101 lightyears, as measured from Hipparcos satellite telescope mission data. From artist Caroline Bowen of Hypotenuse Studios. 

Electric Motor/Generator

Amazingly this motor is available for less than $10 US. 

From Amazon: BUY NOW: Brushless Motor/Generator with LED

Electric Motor/Generator: this inexpensive and common motor can also serve as a generator of AC electricity- here lightning an LED when the shaft of the rotor is spun by hand. Most electrical energy we use today is produced by moving a magnet near a coil of wire (known as Faraday’s law of induction) to produce an electric current. Removing the permanent magnet casing reveals this design to use 9 separate copper windings. I made a transparent second rotor with six neodymium magnets- and when these magnets are made to move near the windings the LED again lights with the flow of current. Swipe to see the beautiful magnetic field pattern of the rotor design using magneview film.


Ice Melt Demo

Get this similar demonstration kit here:
From Educational Innovations: BUY NOW
Ice Blocks Melt Demo

Ice Melt Demonstration: Wood or Aluminum- which will melt the ice fastest and why? Both blocks start at the same temperature (room temp) and have the same shape and volume. Swipe to reveal result shown in real time (not sped up!) Hint: Although both blocks are at the same temperature, the aluminum feels cool to the touch and the wood block feels warm. Those who have taken basic physics should have an advantage on this question- one block is an excellent insulator and the other a conductor.

Moon Globe with Raised Relief

Get this incredible globe here:

From Etsy: BUY NOW: Terrainian Space Globes

Moon Globe with Raised Relief: explore our Moon in your own hands with this incredibly detailed lunar globe where all surface features have been rendered in 3D topographic relief- where the mountains and craters actually cast shadows. Note how the selenography of the far side is radically different from the familiar near side- with no flat maria plains- and craters stacked upon more craters. Humanity has only known what the far side looks like since 1959 when the Soviet spacecraft Luna 3 took the first photos, and the Moon’s full map was completed via NASA’s Clementine orbiter in 1995- the data upon which this globe was made. Shown also are the six Apollo landing sites where humans have left footprints in the lunar regolith. This globe is made by Jeff Hobbs of Terrainian Space Globes by a process of precision CNC machining and cold casting techniques, complete with space-age look base stand. 

The Milky Way in a Sphere

Created by Clemens & Christoph of CinkS labs: Available in a cube too! 
From CinkS Labs: BUY NOW: Milky Way in a Sphere

Special offer for physicsfun folowers: Use code POCKETUS and get a free Pocket Universe with your order of a sphere. Just add the Pocket Universe to your cart and apply the code. 

Click here for Universe Sphere

The Milky Way in a Sphere: the distribution of stars in our home galaxy, laser etched into a crystal sphere, according to the most recent telescopic surveys and mappings- including the stars in the Sagittarius Dwarf Galaxy (a small galaxy that is simultaneously orbiting and getting absorbed into the Milky Way) and the major globular clusters outside the main disk. Another beautiful object created by CinkS Labs.