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what speed of a EM wave in a vacuum?​

Sagot :

Answer:

A large family of waves, each with a different wavelength range is called the electromagnetic spectrum (sometimes shortened to the EM spectrum). These waves all travel at the speed of light (300,000,000 metres per second) in a vacuum.

Explanation:

Sana makatulong po

Answer:

300,000,000 metres per second

Explanation:

A large family of waves, each with a different wavelength range is called the electromagnetic spectrum (sometimes shortened to the EM spectrum). These waves all travel at the speed of light (300,000,000 metres per second) in a vacuum.