Question

What is the wavelength of the radio waves transmitted by an FM station at 90MHz? Where 1M =10 power 6 and speed of radio waves is 3×10 ki power 8 ms

Answer 1

To calculate the wavelength of a radio wave, you will be using the equation: Speed of a wave = wavelength X frequency.

Since radio waves are electromagnetic waves and travel at 2.997 X 108 meters/second, then you will need to know the frequency of the radio wave.

If the radio wave is on an FM station, these are in Megahertz. A megahertz is one million hertz. If the radio wave is from an AM radio station, these are in kilohertz (there are one thousand hertz in a kilohertz). Hertz are waves/second. Hertz is usually the label for the frequency of electromagnetic waves.

To conclude, to determine the wavelength of a radio wave, you take the speed and divide it by the frequency.

Typical radio wave frequencies are about 88~108 MHz. The wavelength is thus typically about 3.41×109 ~ 2.78×109 nm.

Hope this helps