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Can electromagnetic waves have the same typical frequency as sound waves? a) If yes what is...

Can electromagnetic waves have the same typical frequency as sound waves? a) If yes what is the wavelength of a 1 kHz electromagnetic wave? b) What is the wavelength of a 1 kHz sound wave? c) What is the wavelength of a 22.75 GHz radar signal?

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Answer #1

Yes, electromagnetic waves can have the same typical frequencies as sound waves. They usually come in the band of radio waves.

PART A:

The speed of the electromagnetic waves in space is a constant (c = 3 x 108 m/s).

The wavelength for 1 kHz em wave is given by

PART B:

The speed of sound in air is 346 m/s.

The wavelength for 1 kHz sound wave is given by

PART C:

The radar uses radio waves (electromagnetic waves)

So, the wavelength of the 22.75 GHz is given by

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