MIT Kraków https://validator.w3.org/feed/docs/rss2.html Races Wyścigi Huśtawka pojedyncza Muzeum Inżynierii i Techniki Humming pipes Pipe organs Stone cimbalom Purring stone Acoustic telegraph Keyboard aerophone Focusing of sound Water in a rotating cylinder Water in a spinning sphere Joule’s experiment Hydraulic scale Water vortex The Bermuda triangle Cartesian diver Magnetic pendulum Hourglass Chaotic pendulum Magnet races Eddy currents Two mirrors Facial composition Giant kaleidoscope Distorting mirror Cylindrical mirror Periscope Crater Wandering wheel Hidden colours The Newton disc Two polarisers Kaleidoscope Coloured sectors Breathing rectangle Spiral Optical illusion Stationary disc Floating illusion Sculpture Lasers and mirrors Lasers and lenses Diffraction grating Stanisław Lem Experimental Garden Mechanics Rocket Supercool playground Mechanika