issb general knowledge MCQ #306

Speed of light in vacuum is approximately?

issb general knowledge MCQ #306

  1. Question 1

    Q1. Speed of light in vacuum is approximately?

    • A) 3×10⁸ m/s
    • B) 3×10⁶ m/s
    • C) 3×10¹⁰ m/s
    • D) 3×10⁴ m/s

    Answer: 3×10⁸ m/s

    Explanation: Light travels about three hundred million meters per second in vacuum. Work each step carefully; ISSB math rewards accuracy under time pressure.