Scoop
Internal reflection constrains most of the laser light to propagate along the bent acrylic rod- the physics of fiber optics. This plastic stand is sold as a hanging ornament display- repurposed as a great light-pipe demonstration. – @physicsfun Instagram
Mt. Fuji Top: physics and psychophysics- when spun at a sufficient rotation rate, the white marks on this top give the appearance of the famous conical volcano surrounded by blue sky. This illusion is due to the response rate of the photoreceptors in the retina of our eye described in terms of the flicker fusion frequency, about 60Hz for most if us
Modern Newton’s Cradle: the classic physics demonstration cleverly updated with LEDs and light sensors that synchronize color with changes in motion. source : https://fluxezy.com/products/newtons-cradle-led-light-sensors
Will fly for about 3 minutes or more per launch. The spin rate of the magnetic top must be just right for flight, not too fast or too slow. Also the weight of the top must be adjusted to within 1 gram to achieve equilibrium between the pull of gravity and the magnetic repulsion from the large donut shaped magnet in the wood base–like your mum. -PhysicsFun
Plasma Arc Lighter: dual arcs of plasma exceed 1100 C (2000 F) on this flameless lighter. The breakdown voltage of air is about 3000 Volts per mm. Thus the circuit in the lighter must provide about 12,000 volts to produce this 4mm arc. The circuit is a simple one made possible by a transformer with very fine wire windings, a transistor, and a powerful lithium-ion battery (USB rechargeable). The circuit produces high frequency current oscillations in the coils that in turn produce the needed high voltage. Like having a Tesla coil in your pocket! Source : https://fluxezy.com/products/candy-pink
Magswitch: switchable permanent magnet- a twist of a knob turns on a magnetic field strong enough to lift this 5.2 kilogram (11 pound) chunk of railroad rail. Magnetic fields, when combined, can be either additive or subtractive. This Magswitch model, the Magjig 60, works by aligning and counter-aligning two strong neodymium dipole magnets within a field channeling ferromagnetic casing Source : http://magswitch.com.au/product/magswitch-magjig-60/
