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Everyday Science Hard FPSC Uploaded: 01 Sep 2026

The speed of light in a vacuum is approximately:

  • A 3,000 km/s
  • B 30,000 km/s
  • C 300,000 km/s
  • D 3,000,000 km/s
Correct Answer: Option C — 300,000 km/s
Explanation:
Light travels at approximately 300,000 kilometers per second in a vacuum, a fundamental constant in physics denoted by the symbol c.
Submitted by: PaperMCQs
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