US$ 48.00
and image-formation experiments in introductory optics
5mm thermometer hole for specific-heat-capacity experiments
Cut-away 17-inch active volcano model reveals magma chamber
sized for low-current circuit work below the 1A range where finer resolution matters more than full-scale capacity
Ray Box with Magnetic Base, 12V 21W Category_Plasticware and image-formation experiments in introductoryMagnetic base anchors the metal cased unit to benches and steel boards, while variable focus produces five parallel beams that a shutter masks selectively. Ships with a 12V 21W bulb.