An antenna uses electromagnetic waves of freq | vedclass

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(B) The wavelength $\lambda$ of the electromagnetic wave is given by the formula $\lambda = \frac{c}{f}$,where $c$ is the speed of light $(3 	imes 10

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$15 	ext{ m}$

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(B) The wavelength $\lambda$ of the electromagnetic wave is given by the formula $\lambda = \frac{c}{f}$,where $c$ is the speed of light $(3 	imes 10^8 	ext{ m/s})$ and $f$ is the frequency $(5 	imes 10^6 	ext{ Hz})$.Substituting the values: $\lambda = \frac{3 	imes 10^8}{5 	imes 10^6} = 0.6 	imes 10^2 = 60 	ext{ m}$.For an antenna to work efficiently,its length should be at least $\frac{\lambda}{4}$.Therefore,the required size of the antenna is $\frac{60}{4} = 15 	ext{ m}$.

An antenna uses electromagnetic waves of frequency $5 \text{ MHz}$. For proper working,the size of the antenna should be:

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