Who is credited with creating FM radio?

Who is credited with creating FM radio?

• A. Nikola Tesla
• B. Thomas Edison
• C. Edwin Armstrong
• D. Guglielmo Marconi

Answer: (C)

FM radio works by encoding sound through changes in the carrier’s frequency, not its amplitude. This frequency modulation makes the signal far less sensitive to static and noise, so the sound quality is much higher, especially for music. Edwin Armstrong is the one who developed and demonstrated this approach, proving that varying the carrier frequency could carry high-fidelity audio and leading to the first commercial FM broadcasting. His work established FM radio as a distinct method from the older amplitude-modulation approach, which is why he is credited with creating FM radio. Other figures are associated with different aspects of radio history: Marconi helped pioneer early wireless radio communication, primarily in the AM domain; Tesla and Edison contributed foundational innovations in electricity and wireless experiments, but not the development of FM radio itself.

FM radio works by encoding sound through changes in the carrier’s frequency, not its amplitude. This frequency modulation makes the signal far less sensitive to static and noise, so the sound quality is much higher, especially for music.

Edwin Armstrong is the one who developed and demonstrated this approach, proving that varying the carrier frequency could carry high-fidelity audio and leading to the first commercial FM broadcasting. His work established FM radio as a distinct method from the older amplitude-modulation approach, which is why he is credited with creating FM radio.

Other figures are associated with different aspects of radio history: Marconi helped pioneer early wireless radio communication, primarily in the AM domain; Tesla and Edison contributed foundational innovations in electricity and wireless experiments, but not the development of FM radio itself.