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Physics for IGCSE & O level - Rays And Waves (Section 11 - No. 39)

What is the speed of light in a vacuum (approximately)?

300,000 km/s

200,000 km/s

150,000 km/s

100,000 km/s

Wyjaśnienie

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

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