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Inventions MCQs – Certification Test 490

Spectrograph MCQs (Question 490) – App & e-Book Download

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MCQ 490: Spectrograph was invented by:

  1. Sir Henry W. Seelay
  2. Sir Schuyler Skaats Wheeler
  3. Sir Walter Wingfield
  4. Sir George Carruthers
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8th Class Science Test Questions

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