परिदर्शी (पेरिस्कोप) किस स� – McqOptions

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1.	परिदर्शी (पेरिस्कोप) किस सिद्धांत पर काम करता है -
A.	अपवर्तन
B.	पूर्ण आन्तरिक परावर्तन
C.	विवर्तन
D.	परावर्तन
Answer» E.

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