Question 13 Marks
How is the phenomenon of reflection used in making a kaleidoscope. What are the applications of a kaleidoscope?
Answer
View full question & answer→Kaleidoscope is a cylinder with three mirrors containing loose, coloured objects such as beads or pebbles and bits of glass. As the viewer looks into one end, light entering the other creates a colourful pattern due to reflection. Its applications are given below
(i) It works on the principle of multiple reflection, where several mirrors are placed at an angle (usually $60^{\circ}$) to one another. Typically, these are three rectangular mirrors set at $60^{\circ}$ to each other, so that they form an equilateral triangle.
(ii) The $60^{\circ}$ angle creates seven duplicate images of the objects, 5 at $60^{\circ}$ and 2 at $90^{\circ}.$ As the tube is rotated, the tumbling of the coloured objects present varying colours and patterns.
(iii) It is used in decoration purposes, attractive toys, etc
(i) It works on the principle of multiple reflection, where several mirrors are placed at an angle (usually $60^{\circ}$) to one another. Typically, these are three rectangular mirrors set at $60^{\circ}$ to each other, so that they form an equilateral triangle.
(ii) The $60^{\circ}$ angle creates seven duplicate images of the objects, 5 at $60^{\circ}$ and 2 at $90^{\circ}.$ As the tube is rotated, the tumbling of the coloured objects present varying colours and patterns.
(iii) It is used in decoration purposes, attractive toys, etc
