Physics · Optics
निम्नलिखित में से ऑप्टिकल फाइबर का आविष्कार किसने किया?
- 1थॉमस एडिसन
- 2नरिंदर कपानी✓
- 3पर्सी स्पेंसर
- 4सैमुअल कोहेन
सही उत्तर देखें
नरिंदर कपानी
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