Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).
Physics in Everyday LifeLight & Optics (incl. Lenses)
The speed of light in vacuum is about
- A.300,000 kilometers per secondCorrect answer
- B.150,000 kilometers per second
- C.500,000 kilometers per second
- D.1,000,000 kilometers per second
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Practice these MCQs in the appQuick fact: The speed of light in vacuum is approximately 300,000 kilometers per second (or 3 × 10⁸ m/s).