a) A kaleidoscope is used to make designer wallpapers and fabrics. Which principle is used in this instrument? Also state an interesting feature about it. b) An object placed 4 m from a plane mirror is shifted by 0.5 m away from the mirror. What is the distance between the object and its image? c) Figure (6) shows successive still images of a man running. When would these different images appear like a movie?
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Most kaleidoscopes are mass-produced from inexpensive materials, and intended as children's toys. At the other extreme are handmade pieces that display fine craftsmanship. Craft galleries often carry a few kaleidoscopes, while other enterprises specialize in them, carrying dozens of different types from different artists and craftspeople. Most handmade kaleidoscopes are now made in India, Bangladesh, Japan, the USA, Russia and Italy, following a long tradition of glass craftsmanship in those countries.
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