General Science- Prakash Ka Veg Sarwapratham Kisne Gyat Kiya ?

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Q.10614: प्रकाश का वेग सर्वप्रथम किसने ज्ञात किया ?
A.
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D.
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प्रकाश का वेग सर्वप्रथम किसने ज्ञात किया ? General Science in hindi,   Newton question answers in hindi pdf  Romer questions in hindi, Know About Galilio General Science online test General Science notes in hindi quiz book    Mickelson