Question

how many plane mirror are fixed in a kaleidoscope?

Answer 1

There are three plain mirrors in a Kaleidiscope placed at an angle of 60° to each other.

It forms a triangular tube with coloured glass/ plastic pieces at one end and an eyepiece at another end.

Multiple reflections of these colored objects form interesting patterns.

Answer 2

there are 3 plain mirrors fixed at angle 60° in a kaleidoscope
hope this helps :)
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