If the length of an antenna is 150 ,cm,the tr | vedclass

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(C) For an efficient antenna,the length $L$ is typically related to the wavelength $\lambda$ by $L = \frac{\lambda}{4}$.Given $L = 150 \,cm = 1.5 \,m$

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$50$

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(C) For an efficient antenna,the length $L$ is typically related to the wavelength $\lambda$ by $L = \frac{\lambda}{4}$.Given $L = 150 \,cm = 1.5 \,m$.Therefore,$\lambda = 4L = 4 	imes 1.5 \,m = 6 \,m$.The relationship between frequency $f$,speed of light $c$,and wavelength $\lambda$ is $f = \frac{c}{\lambda}$.Substituting the values: $f = \frac{3 	imes 10^8 \,ms^{-1}}{6 \,m} = 0.5 	imes 10^8 \,Hz = 50 	imes 10^6 \,Hz$.Since $1 \,MHz = 10^6 \,Hz$,the frequency $f = 50 \,MHz$.

If the length of an antenna is $150 \,cm$,the transmission frequency is . . . . . . $MHz$. (Speed of light in vacuum $= 3 \times 10^8 \,ms^{-1}$)

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