what is kaleidoscope and Periscope give me answer in hundred words ?
Answers
Periscope
Periscopes are instruments that allow the viewing of objects that are not in the direct line of vision. They are often found in submarines and may have tubes up to 10 meters long. Tanks also contain periscopes that allow people inside of a tank to view the surrounding area while remaining protected inside of the vehicle. The development of fiber optics led to the development of other types of periscopes that allow doctors to view inside the human body without having to perform major surgery. These types of periscopes are called endoscopes or cystoscopes and are very useful in the medical field.
Kaleidoscope
The kaleidoscope was invented by Sir David Brewster around 1816 and patented the following year. The device uses the image-forming properties of combined inclined mirrors. Depending on the number of mirrors and the angle between them, the kaleidoscope will produce multiple symmetrical patterns. Since its introduction, the kaleidoscope has been sold primarily as a toy, but has practical uses as well.
A simple kaleidoscope is made of two thin, wedge-shaped mirror strips touching along a common edge or a single sheet of bright aluminum bent to an angle of 45 or 60 degrees. The mirrors are enclosed in a tube with a viewing eyehole at one end. At the other end is a thin, flat box that can be rotated. This flat box is made from two glass disks, the outer one ground to act as a diffusing screen. In this box are pieces of colored glass or beads. When the box is turned or tapped, the objects inside tumble into different groups and when the diffusing screen is illuminated by natural or artificial light, six or eight different symmetrical images appear. The number of combinations and patterns is without limit.
There are five different types of kaleidoscopes. The chamber kaleidoscope has an enclosed object case with free-tumbling jewels, glass, beads or other objects. The liquid chamberscope has an object case filled with liquid (usually glycerin) in which the jewels, glass beads, or other objects float. The wheel scope has one or more wheels at its objective end that may contain glass, translucent rocks like agates, pressed flowers, beads, jewels, or other objects. The refillable scope features a removable object chamber. The contents of this chamber can be changed and users can experiment with their own assortment of colors and objects. The teleidoscope uses mirrors and lenses alone so that anything that is viewed, is multiplied.
Answer:
periscope is the right answer