Final answer:
The wavelength of the signal transmitted by a 25m long antenna (one-fourth the wavelength) is 100 meters.
Step-by-step explanation:
The wavelength of the signal transmitted by an antenna can be determined by considering the efficient broadcasting principles. For antennas with one end on the ground, the most efficient size is one that has a length one-fourth the wavelength of the signal (λ/4). Since the antenna in question is 25 meters long and considering the efficiency rule, the wavelength (λ) would be four times the length of the antenna.
To calculate the wavelength:
- λ = 4 × (length of the antenna)
- λ = 4 × 25 m
- λ = 100 m
Thus, the wavelength of the signal that the antenna transmits most efficiently is 100 meters.