Question

Electromagnetic waves and sound waves can have the same frequency. what is the wavelength of a 1.10 khz electromagnetic wave

Answer 1

The wavelength of an electromagnetic wave is given by

`\lambda = (c)/(f)`
where
`c=3 \cdot 10^8 m/s` is the speed of light and
`f=1.10 kHz = 1100 Hz` is the frequency. Substituting the numbers, we find

`\lambda = (3 \cdot 10^8 m/s)/(1100 Hz)=2.72 \cdot 10^5 m=272 km`
So, the wave in the problem has a wavelength of 272 km.