issb general knowledge MCQ #101

The speed of light in a vacuum is approximately:

issb general knowledge MCQ #101

  1. Question 1

    Q1. The speed of light in a vacuum is approximately:

    • A) 3 x 10^6 m/s
    • B) 3 x 10^7 m/s
    • C) 30 x 10^8 m/s
    • D) 3 x 10^8 m/s

    Answer: 3 x 10^8 m/s

    Explanation: Light in vacuum travels at about 3 x 10^8 m/s, a fixed constant used across optics and electromagnetism. The other values are far too low or incorrectly scaled.