This is an excellent and economical set for introductory ray optics.  The laser ray box projects one, three, or five parallel bright beams and is equipped with a momentary switch for safety.  A vinyl template with a degree circle and a linear scale forms the optical disk, and the set includes seven clear acrylic optical elements and a mirror with adjustable curvature for investigating refraction, lenses, prisms and mirrors.  The bottoms of the acrylic elements are frosted to show the ray paths inside them.  The set also includes a manual and storage box.

Please note:  This product emits laser light.  Max. output power<1mW per beam.  Wavelength 650nm.  Class IIIa laser product.

Contents:
Wall-mount Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Laser Ray Box (1, 3, or 5 rays) . . . . . . . . . . . . . . . . . . . . . . . . .1
Parallel-sided Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Trapezoidal Prism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Right Angle Prism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Biconcave Lens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Biconvex Lens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Semicircular Lens (solid) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Semicircular Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Flexible Template—ruler & protractor . . . . . . . . . . . . . . . . . . . . . .1
Adjustable Mirror—plane/concave/convex . . . . . . . . . . . . . . . . .1
Aluminum Storage Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Activity Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1