BLOCKS [Rectangle-Half-round]: Perspex acrylic, Glass

BLOCKS [Rectangle-Half-round]: Perspex acrylic, Glass

•  A variety of Glass and Perspex acrylic Blocks, Rectangular or Half-round, for use in Science laboratory and optical light boxes.
•  Glass Blocks are a solid optical glass.
•  Perspex acrylic Blocks are opaque with small handle for moving them without having to touch the polished surfaces. (These are also used with the LIGHT BOX & OPTICAL SET.)
•  View other related Optical Equipment

(Wikipedia excerpt:  .."...An optical Prism [P] is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not [P] . The most familiar type of optical [P] is the triangular [P] , which has a triangular base and rectangular sides. Not all optical [P] are geometric [P] , and not all geometric [P] would count as an optical [P] . [P] can be made from any material that is transparent to the wavelengths for which they are designed. Typical materials include glass, acrylic and fluorite.

...Glass brick, also known as glass block [B] , is an architectural element made from glass. The appearance of glass [B] can vary in color, size, texture and form. Glass bricks provide visual obscuration while admitting light. The modern glass [B] was developed from pre-existing prism lighting principles in the early 1900s to provide natural light in manufacturing plants. Today glass [B] are used in walls, skylights, and sidewalk lights.
...The texture and color of glass [B] can vary in order to provide a range of transparency. Patterns can be pressed into either the inner void or the outside surface of the glass when it is cooling in order to provide differing effects. Glazes or inserts may also be added in order to create a desired private or decorative effect...

..Poly(methyl methacrylate) (PMMA) is a synthetic polymer derived from methyl methacrylate. It is a transparent thermoplastic, used as an engineering plastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others (see below). This plastic is often used in sheet form as a lightweight or shatter-resistant alternative to glass. It can also be used as a casting resin, in inks and coatings, and for many other purposes.  It is often technically classified as a type of glass, in that it is a non-crystalline vitreous substance—hence its occasional historic designation as acrylic glass....")

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