Talk-radio station KOOK is at approximately 90 megahertz on the radio dial. This means that KOOK broadcasts

A) an electromagnetic wave whose frequency is 90 vibrations/second.
B) an electromagnetic wave whose frequency is 90 × 106 vibrations/second.
C) an electromagnetic wave whose wavelength is 90 × 106 vibrations per second.
D) a sound wave whose frequency is 90 × 106 vibrations/second.
E) a sound wave whose frequency is 90 vibrations/second.


B

Physics & Space Science

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