If a message signal of frequency

Question:

If a message signal of frequency ' $f_{\mathrm{m}}$ ' 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:

  1. $\frac{\mathrm{c}}{f_{\mathrm{c}}-f_{\mathrm{m}}}$

  2. $\frac{\mathrm{c}}{f_{\mathrm{m}}}$

  3. $\frac{\mathrm{c}}{f_{\mathrm{c}}+f_{\mathrm{m}}}$

  4. $\frac{\mathrm{c}}{f_{\mathrm{c}}}$

Correct Option: , 4

Solution:

(4) $\lambda=\frac{V}{f}=\frac{c}{f_{c}}$

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