Why less radiated power of FM over Am?

FM (Frequency Modulation) generally requires less radiated power than AM (Amplitude Modulation) because FM signals are less susceptible to interference and noise, allowing for clearer reception at lower power levels. Additionally, FM's inherent characteristics, such as its use of a wider bandwidth, enable it to transmit high-fidelity audio without the need for excessive power. This efficiency results in FM stations often broadcasting with lower power compared to AM stations while still achieving better sound quality and coverage.