Click here to download the catalog as a PDF file. To view this site you need Adobe Flash Player and your browser must allow javaScripts. Go here to get the latest Flash Player. Engage students’ attention with demonstrations of reflection, refraction, and color! Light & Color Lens Set Crown glass lenses packed in lined wood storage box, perfect for optical benches or basic optics demonstrations. Each set includes double convex, plano-convex, concavo-convex, double concave, plano-concave, and convexo-concave lenses. 50 mm diameter lenses, f = +/-180 mm. P2-1200 Lens Set $18 NEW! Newton’s Ring Apparatus Newton’s Rings are the interference pattern seen when light passes through two glass pieces, one convex and the other flat, pressed together. The colorful rings that result from this simple arrangement, even in normal room light, is quite amazing, and will prompt discussions of light interference, refraction, and the visible spectrum. Apparatus consists of two 60 mm glass plates in a metal frame, adjusted with three screws. P2-1300 Newton’s Ring Apparatus $15 Matched convex/concave lens set will enhance understanding of refraction. Hollow Prism Fill this equilateral prism with any liquid — water, mineral oil, glycerin, colored water, etc — and discover the resulting spectrum. 5 cm sides, acrylic with stopper. 33-0235 Hollow Prism $9.95 NEW! Neutralizing Lens Set Two matched lenses, one concave and one convex, when placed together, result in no magnification at all — like flat glass. Let students independently find the focal lengths of each lens and predict what will happen when they are combined. Focal length +/- 115 mm, 38 mm diameter, with storage box. P2-1400 P2-1400 P2-1205 Neutralizing Lens Set Plastic Mirror Holders 6/pk. Lens Cleaning Paper $5 $3.50 $2.50 NEW! Fill the Hollow Prism with different liquids and compare the resulting spectra. Polarizing Filters Linear polarizing film for use with visible light. Align two sheets and light passes through. Rotate one filter 90 degrees and the light is completely blocked! Place optically active objects (see photo) between two sheets for a colorful display! Einstein is watching you! You’ve got to see this to believe it! Shine a source of light at the back of this mask and look at the concave side. The mask appears to reverse, as if Einstein is looking at you! Move back and forth, and his face turns to follow you! Move up and down, and he nods his head. The appearance of depth comes from the pattern of shadows that forms on the face. A fascinating study in how the brain interprets patterns of light! Explanation sheet included. P2-6000 Einstein Alive $20 When you move, his face turns to follow! When properly lit, the shadows on this concave mask make it appear to be convex. This unique illusion can add a discussion of human perception to your unit on light. Common plastic items shown under a polarizing filter Durable 0.75 mm thick, rigid filters. P2-9400 50 mm x 50 mm 20/pk. $49 P2-9410 100 mm x 200 mm 2/pk. $37 Flexible 0.15 mm thick filter can be easily cut for your needs. P2-9415 Approx. 30 cm x 43 cm Flexible filters mounted in slide frames for student use. $39 P2-9405 35 mm slide mounted filters 50/pk. $33 11 To order visit arborsci.com