What key invention did Philo Farnsworth patent?

• A. The first electronic television
• B. The first color television
• C. The radar
• D. The motion picture camera

Answer: (A)

The key idea here is the invention of an all-electronic television system. Farnsworth’s breakthrough was patents for a complete electronic television setup that scanned an image electronically, transmitted the resulting signals, and reproduced them on a screen, using devices like the image dissector camera tube. This marked the transition from mechanical scanning methods to fully electronic broadcasting, laying the groundwork for modern TV.

Color television, radar, and the motion picture camera all involve different technologies developed in other contexts or later periods. Color TV came after the basic electronic system was established, radar emerged from separate wartime research into radio waves, and motion picture cameras existed long before this moment. The invention Farnsworth patented is specifically the first practical, fully electronic television system.