US$ 501.43
running battery-free for repeatable classroom and stockroom use
Designed for strong divergence demos
and raised molded graduations
Six replacement gold leaves cut to fit the standard gold-leaf electroscope
sized to fit the PH0380A bar-breaking apparatus for repeated thermal-contraction fracture demonstrations
Circular Perspex Block for Refraction Science at Home_Earth Science running battery-free for repeatable classroomRound perspex refraction block, the curved face geometry letting beams enter along any radius for clean Snell's law angle work in ray box and refraction setups.
US$ 501.43
US$ 26.10
US$ 86.62
US$ 65.93
US$ 150.56
US$ 52.03
US$ 148.30
US$ 153.27
US$ 132.25
US$ 41.06