Instruments based on the concept of symmetry

6. Kaleidoscope is an optical instrument based on the concept 'symmetry' in which bits of glass are held loosely at the end of a rotating tube showing changing symmetrical forms. Write few more instruments based on the concept.

Dear Student,

It is a concept based query and it appears to be unclear.

Regards

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IT IS NOT CLEAR BRO
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What are you looking for?