In which year did Andre-Marie Ampère publish his magnum opus ‘Mathematical Theory of Electrodynamic Phenomena Deduced Solely from Experiments’?
In which year did Andre-Marie Ampère publish his magnum opus ‘Mathematical Theory of Electrodynamic Phenomena Deduced Solely from Experiments’? आंद्रे-मैरी एम्पीयर ने अपना महान ग्रंथ ‘मैथेमैटिकल थ्योरी ऑफ इलेक्ट्रोडायनामिक फेनोमेना डिड्यूस्ड सोलली फ्रॉम एक्सपेरिमेंट्स’ किस वर्ष प्रकाशित किया था?