The idea of multiple images formed by plane mirrors is used in:

a periscope

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a kaleidoscope

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a telescope

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all the above

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Solution

The correct option is B a kaleidoscope
The idea of multiple images formed by mirrors, placed at an angle to one another, is used in a kaleidoscope.
As can be seen in picture three mirrors placed at an angle to each other(axial view) are present in kaleidoscope which forms multiple images.
The side view of kaleidoscope is also given .

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