Question

what is the use of khelidoscope​

Answer 1

A kaleidoscope works by reflecting light that bumps into a reflective surface such as a mirror. ... At the most basic level, a kaleidoscope is made of two or more mirrors or reflective surfaces positioned at an angle to each other, usually forming a V-shape or a triangle.
Or
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.

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