Question

If a source is transmitting electro-magnetic waves of frequency $8.196\times {10}^{6}Hz$, then the wavelength of the electro-magnetic waves transmitted from the source will be

• A. $5090cm$
• B. $4050cm$
• C. $4230cm$
• D. $3660cm$

Answer 1

The correct option is D $3660cm$

Given, frequency of $EM$ waves
$v=8.196\times {10}^{6}Hz$
velocity of $EM$ waves $\left(v\right)=3\times {10}^{8}m/s$
$\therefore$ Wavelength of $EM$ waves $\lambda =\frac{v}{v}$
$=\frac{3\times {10}^8}{8.196\times {10}^6}=36.60m$
$=3660cm$.