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OPTICS & LIGHT, CONTINUEDMagnetic Optics and Ray Box SetThis magnetic set is for use on any steel whiteboard to demonstrate optics concepts. Durable, double-ended box has a fan-cooled halogen lamp. One end has a cylindrical lens and plate slots to create parallel beams while the other accepts color filters and adjustable mirrors to study color mixing. Includes acrylic lenses and prisms, a hollow cell, mirrors, color filters and paddles, an experiment manual and more in a convenient storage box. AP7823 I $222.60Refraction and Total Internal Reflection—Classroom SetStudents track a laser beam path as it travels from air into red gelatin. Beams in gelatin let students draw accurate refraction diagrams, which move closer to the normal line on the diagram as light slows and father away as light speeds up until total internal reflection. Measure angles of incidence and refraction to calculate the speed of light in gelatin with Snell’s Law. Includes worksheets, Teacher Notes, sample data and necessary supplies. AP7270 I $68.80Refraction Dish, SemicircleFilled with water or other liquids, these semi-circular transparent refraction dishes become perfect cylindrical lenses. Use them for a vari-ety of classic optical experiments. Excellent for comparing the refraction rates of various liquids. The tanks are made of clear plastic and have a radius of 4¾” and a depth of 1”.AP6039 I $3.35Dual Laser Pointer, Red and GreenHigh-quality laser emits both red and green beams individually or simultaneously. Perfect for optics demonstrations and experiments to study reflection, refraction and diffraction. Use during lectures and presentations from 500 meters away. Incorporates the latest tech-nology in Diode Pumped Solid State Laser. Includes two AAA batteries and a convenient, protective case.AP7835 I $64.30LED Light BlocksThis unique design includes end adapters that create thin light beams that can be directed through optical blocks to study reflection, refraction and focal length. Arrange the beams as parallel, diffused or convergent, or remove adapters to create wider beams of light for color mixing. A magnet is attached to the bottom so the versatile blocks can be used for classroom demonstrations on a whiteboard. 4½” x 1¼” x ¾”.AP7771 I $32.70