Hollow Glass Prism with Stopper, 1.5 x 1.5" Physics_Alternative Energy Acrylic bell-in-vacuum jar with an

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

sized for a complete length-versus-strength comparison study using one consistent material

passenger deactivation switches

Rat dissection model demonstrates rodent anatomy

the longer body bending and dispersing wider beams for refraction

Hollow Glass Prism with Stopper, 1.5 x 1.5" Physics_Alternative Energy Acrylic bell-in-vacuum jar with anPairs a 1. 5 by 1. 5 inch hollow glass prism with a stopper, students filling the cavity with water or other liquids to study Snell's law and refraction index variation by medium.