## College Physics (4th Edition)

The maximum length of the antenna is $3.0~cm$
We can find the wavelength of the microwaves: $\lambda = \frac{c}{f}$ $\lambda = \frac{3.0\times 10^8~m/s}{5.0\times 10^9~Hz}$ $\lambda = 0.060~m = 6.0~cm$ Since the antenna is not to exceed half of a wavelength, the maximum length of the antenna is $3.0~cm$