To find the shortest wavelength of an AM radio signal, we can use the formula λ = c/f, where λ is the wavelength, c is the speed of light, and f is the frequency.
For the AM radio frequencies, the shortest wavelength would be at the highest frequency of 1700 kHz. So,
λ = c/f = 3 x 10^8 m/s / 1700 x 10^3 Hz = 176.47 meters
Therefore, the shortest wavelength of an AM radio signal from this frequency range is approximately 176.47 meters.