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Speed of light is approximately?

A200,000 km/s

B300,000 km/s

C400,000 km/s

D500,000 km/s

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Correct Answer: B: 300,000 km/s

Explanation: Speed of light in vacuum: ~299,792 km/s (rounded to 300,000 km/s). Symbol: c. Light takes ~8 minutes to travel from Sun to Earth. Fastest possible speed in universe.

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