✅Add water up to the tank's midline and create a surface that precisely transmits and reflects the laser beam for student observations.
✅The laser revolves around the circular graduated scale and can be set at any point. Students can easily observe light rays as they travel from air into water, water into air, and water into water. Circular scale is 6-3/8" diameter.
✅You can also detach the apparatus from the tank to perform refraction and reflection experiments with the included prisms and mirrors!
✅Requires 2 AA batteries not included.
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