Physics for IGCSE & O level - Rays And Waves (Section 8 - No. 7) | ExamPlay

Physics for IGCSE & O level - Rays And Waves (Section 8 - No. 7)

What is the speed of light in 300,000 km/s in?

air

water

vacuum

glass

Vysvětlení

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

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