If a message signal of frequency $f_{m}$ is amplitude modulated with a carrier signal of frequency $f_{c}$ and radiated through an antenna,the wavelength of the corresponding signal in air is ....... .

  • A
    $\frac{c}{f_{c}-f_{m}}$
  • B
    $\frac{c}{f_{m}}$
  • C
    $\frac{c}{f_{c}+f_{m}}$
  • D
    $\frac{c}{f_{c}}$

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