Measure refraction, critical angle, Snell’s Law and more with water optics Explore the behavior of light at boundaries with a clear, classroom-ready optical tool. Arbor Scientific’s Laser Refraction Tank allows students to directly measure and observe refraction, reflection, and critical angles as a laser beam passes between air and water. A built-in laser source revolves around a circular graduated scale, so teachers and students alike can set and read incident and refracted angles with precision while visualizing light paths through different media. The tank’s clear acrylic and simple water fill make the curved path of light easy to see as it moves from air into water, water into air, or even within water itself. Detachable prisms and mirrors extend the range of optics investigations, letting you perform supplementary reflection and refraction experiments with the same apparatus. Why Teachers Love the Laser Refraction Tank Visual, hands-on optics exploration: Students see light rays bend and reflect in real time, making abstract refraction concepts concrete. Rotating laser with graduated scale: The laser can be positioned anywhere around the circular scale to measure angles with one-degree precision. Multi-phenomena optics: Observe refraction at boundaries, reflection, and total internal reflection at different angles. Expandable experiments: Detachable optics (prisms, mirrors) turn the same tank into a platform for broader light-behavior investigations.