6. Which technology mentioned in the passage was the first one invented by Edison?
Answer: A
The first technology invented by Edison was the vote recorder.
Edison received his first patent for the vote recorder in 1869, making it the earliest invention mentioned in the passage. This technology aimed to expedite the process of recording legislative votes.
A) vote recorder
This option is correct as it refers to the first patent Edison received in 1869, prior to any other inventions listed. The vote recorder was specifically designed to facilitate the quick recording of votes in legislative settings, marking Edison's initial contribution to technological innovation.
B) motion-picture camera
The motion-picture camera was invented by Edison in 1893, which is significantly later than the vote recorder. While it is an important invention, it does not qualify as the first technology developed by Edison, making this option incorrect.
C) electric light bulb
Although Edison is famously associated with the electric light bulb, which he patented in 1879, this invention came after the vote recorder. Thus, while significant, it is not the first technology he invented, rendering this option incorrect.
D) phonograph
The phonograph, introduced in 1877, was another pivotal invention of Edison. However, it also came after the vote recorder. Therefore, this option is incorrect as it does not represent Edison's first technological achievement.
Conclusion
The vote recorder is definitively the first technology invented by Edison, as evidenced by the timeline provided in the extract. All other options represent inventions that occurred later in Edison's career, thus failing to answer the question accurately. This highlights the importance of understanding the chronological order of Edison's innovations.