What is the approximate speed of light in vacuum?
- A. 3 × 10^6 m/s
- B. 3 × 10^8 m/s ✓
- C. 3 × 10^10 m/s
- D. 3 × 10^5 m/s
Correct answer
B. 3 × 10^8 m/s
Explanation
The speed of light in vacuum (c) is approximately 299,792,458 m/s, commonly approximated as 3 × 10^8 m/s. It is a fundamental constant of nature.