General Knowledge
Solved MCQs
Medium
Question
The speed of light in vacuum is approximately:
A
3 × 10⁶ m/s
B
3 × 10⁸ m/s
✓ Official correct answer
C
3 × 10¹⁰ m/s
D
3 × 10⁵ m/s
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
3 × 10⁶ m/s
No member explanations yet for this option.
B
3 × 10⁸ m/s
No member explanations yet for this option.
C
3 × 10¹⁰ m/s
No member explanations yet for this option.
D
3 × 10⁵ m/s
No member explanations yet for this option.
Explanation
Light travels at about 299,792 km/s (≈ 3×10⁸ m/s) in vacuum.