The refraction tank with laser provides excellent visibility!

• Rotating laser for easy positioning
• Demonstrate refraction and internal reflection

Use this sturdy, self-contained device to measure the refraction and incidence of light as well as the critical angle and total internal reflection. Simply fill the circular acrylic tank halfway with water and use the built-in laser, which can be rotated 360° around the tank, to direct a bright, narrow ray of light onto the water surface. The base contains 4 leveling screws to level the water in the tank. Appropriate for Grades 6-12. Requires (1) LR44 button battery (included).