optics
Architectural Caustics
A Research PaperTo control the shape of a caustic pattern generated by a specular or refractive surface, we need to solve the inverse problem: how can we change the surface geometry, such that incident light is redirected to produce a desired caustic image?
Gifts and occupations
Between 1835 and 1850 Froebel worked on his “Gifts and Occupations” — a set of geometric blocks (Gifts) and basic craft activities (Occupations), that would become the centerpiece of his pedagogical theory. The Gifts and Occupations were introduced in a highly ordered sequence, which began in the child’s second month and concluded in the last year of kindergarten.