Final answer:
Edwin Armstrong developed FM radio, but was opposed by David Sarnoff of RCA who had interests in AM radio. The conflict had a detrimental impact on Armstrong, but FM radio ultimately prevailed as the standard.
Step-by-step explanation:
The developer of FM radio was Edwin Armstrong, who was undermined by radio mogul David Sarnoff. Armstrong's pioneering work in frequency modulation (FM) radio offered higher-quality sound over longer distances compared to the standard amplitude modulation (AM) radio of the time. However, his developments threatened the established business interests of figures like Sarnoff, who had significant investments in AM radio technology and infrastructure through the Radio Corporation of America (RCA)
Sarnoff, while initially supportive of Armstrong's work, later opposed FM radio to protect RCA's commercial interests in AM radio. The ensuing conflict greatly affected Armstrong both personally and professionally, eventually leading to his tragic end. Despite these challenges, FM radio eventually became the standard due to its superior sound quality, and Armstrong is remembered as one of the great inventors in radio history.