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. Share with your friends Share 0 Yash Raj answered this Dear Student, It is a concept based query and it appears to be unclear. Regards 0 View Full Answer Binayak Sahu answered this IT IS NOT CLEAR BRO 1