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What is the approximate velocity of electromagnetic wave transmission?

  • A

    123 000 m/s

  • B

    300 000 m/s

  • C

    123 000 km/s

  • D

    300 000 km/s

Electromagnetic waves, including light, radio, and VHF signals, travel through a vacuum at the speed of light, which is approximately 300 000 kilometers per second (km/s). The speed of light is a fundamental constant of nature, denoted by the symbol c. Electromagnetic radiation has similar properties to light.

  • c (speed of light) = 300 000 km/s

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