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وارد شوید

Physics for IGCSE & O level - Rays And Waves (Section 11 - No. 13)

What is the approximate speed of all electromagnetic waves?
300,000 km/s
150,000 km/s
100,000 km/s
600,000 km/s

توضیح

All electromagnetic waves travel at the speed of light (approximately 300,000 km/s).

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