How is kaleidoscope made ? Give its uses also
Answers
This is an optical toy consisting of two mirrors at a particular angle, such as 30 degrees contained within a cylindrical tube. Small coloured objects are scattered on a translucent floor between them and are held in place by clear glass. These are seen as identical multiple images - in this case 12 (12x30=360) when the device is held up to the light and viewed through a small lensed viewfinder at the other end of the tube. Different angles produce different numbers of images - 120 degrees produces 3, 60 degrees produces 6 and so on. The pattern can be changed by randomly shaking so that the small objects - often small and differently shaped and coloured produce a new random configuration to be multiply reflected.
A kaleidoscope is an optical instrument with two or more reflecting surfaces tilted to each other in an angle, so that one or more (parts of) objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end, due to repeated reflection. The reflectors (or mirrors) are usually enclosed in a tube, often containing on one end a cell with loose, colored pieces of glass or other transparent (and/or opaque) materials to be reflected into the viewed pattern. Rotation of the cell causes motion of the materials, resulting in an ever-changing viewed pattern.