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Math Help - wavelength of radio

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    wavelength of radio

    Find the wavelength for a typical AM radio with a frequency of 900 kHz?


    Find the wavelength for a typical FM radio with a frequency of 99.6 MHz
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  2. #2
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    Quote Originally Posted by lovinhockey26 View Post
    Find the wavelength for a typical AM radio with a frequency of 900 kHz?


    Find the wavelength for a typical FM radio with a frequency of 99.6 MHz
    I'll use the value of the light speed in vacuum which I have at hand (this value is from 1972 so it may differ a little bit today): c = 299,792,456\ \frac ms

    Let f denote the frequency and l the wavelength then you know that

    f \cdot l = c

    Plug in the values you already know:

    900 \cdot 10^3\ \frac1s \cdot l = 299,792,456\ \frac ms

    99.6 \cdot 10^6\ \frac1s \cdot l = 299,792,456\ \frac ms . Solve for l.

    (For confrmation only: 333.103 m; 3.01 m)
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