Motion Lamps on top of your console TV
How they work:
Heat from the bulb causes a convection current of air that passes through the turbine at the top. This turns the partially transparent inner cylinder (clockwise, in the above example) which casts spiral striped shadows onto the outer cylinder, giving the illusion of motion.
How they work:
Heat from the bulb causes a convection current of air that passes through the turbine at the top. This turns the partially transparent inner cylinder (clockwise, in the above example) which casts spiral striped shadows onto the outer cylinder, giving the illusion of motion.