General Science · Inventions and Discoveries

थियोडोर मेमैन द्वारा पहले कार्यशील लेजर (Laser) का प्रदर्शन किस वर्ष किया गया था?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

सही उत्तर देखें

1960

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