Circular Perspex Block for Refraction Science at Home_Earth Science and small diffraction objects in

and small diffraction objects in the optical-bench beam path for repeatable interference and diffraction work

Designed for strong divergence demos

sized to fit the PH0380A bar-breaking apparatus for repeated thermal-contraction fracture demonstrations

Six replacement gold leaves cut to fit the standard gold-leaf electroscope

Use for investigation of gas at constant volume By inserting the glass bulb into either warm or cold water the expansion and contraction to the air contained in the bulb can be seen as a pressure change on the gauge

Circular Perspex Block for Refraction Science at Home_Earth Science and small diffraction objects inRound 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.