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Electricity and Magnetism
Hand Battery 91
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1980 Exploratorium acrylic Additions and Changes aluminum angle arch ball block blue bolted bottom brine shrimp Brownian motion bulb button cells charge coil color copper crayfish Critique and Speculation Description diagram diameter dichroic filters diffraction grating disks electrical electrodes Exploratorium Exhibit Graphics fingers frame frequency front glass Glass Catfish glued grasshopper green hand heat hole index of refraction inside lamp lens light source liquid crystal look magnet masonite material metal meter mirror moire patterns molecules motion motor mounted move Notice nylon oscilloscope painted panel pendulum photometer piece placed plate plexiglas plexiglass polarizing filter prism reflected Related Exploratorium Exhibits ring rods roller rotating sand screen screwed shadow sheet side slide solenoid sound speaker spectrum stainless steel stick string switch tank thick threads tube vertical vibrating visitor voltage waves welded wheel white light wire wooden