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Inventions Exam Prep: Certification Test 145

Laser Learning App & e-Book: MCQ 145

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MCQ: 145

The first laser was invented by an American engineer named as

  1. Sind ibn Ali
  2. Ibraim al Fazari
  3. Sir Theodore Maiman
  4. Sir Steven Sasson
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8th Class Science Test Questions

8th Class Science Quiz with Answers