Q. Which Indian scientist discovered wireless communication before Marconi but didn't receive international recognition?
मार्कोनी से पहले किस भारतीय वैज्ञानिक ने वायरलेस संचार की खोज की थी लेकिन उसे अंतरराष्ट्रीय मान्यता नहीं मिली?
Explanation
In 1895 Bose publicly demonstrated radio-wave transmission over ~75 m in Calcutta and later developed waveguides and crystal detectors. He patented none of it, so Marconi’s 1896 patent overshadowed his pioneering work.
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