Physics for IGCSE & O level - Rays And Waves (Section 1 - No. 33)

What is the speed of light in a vacuum?

100,000 km/s

200,000 km/s

300,000 km/s

400,000 km/s

הֶסבֵּר

The speed of light in a vacuum is approximately 300,000 km/s.

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