Select TWO correct answers.
Which of the communication technologies was invented in the 19th century?
newspaper press
commercial radio
telegraph
telephone
telegraph
telephone
The correct answers are:
1. Telegraph: The telegraph, which allowed the transmission of messages over long distances using a system of electrical signals, was invented in the 19th century. This technology revolutionized communication and was widely used for many years.
2. Telephone: The telephone, which allowed for voice communication over long distances, was also invented in the 19th century. It was a major breakthrough in communication technology and quickly became an essential tool.
To determine which of the communication technologies were invented in the 19th century, we can look up the historical timeline of each technology.
1. Newspaper press: The printing press, which was used for mass production of newspapers, was invented by Johannes Gutenberg in the 15th century, well before the 19th century. Therefore, this option is NOT correct.
2. Commercial radio: The first successful commercial radio transmission occurred in the early 20th century, specifically in the year 1920. Therefore, this option is NOT correct.
3. Telegraph: The telegraph was indeed invented in the 19th century. In 1837, Samuel Morse and Alfred Vail successfully demonstrated the telegraph, revolutionizing long-distance communication. Therefore, this option is correct.
4. Telephone: The telephone was also invented in the 19th century. In 1876, Alexander Graham Bell patented the telephone, enabling voice communication over long distances. Therefore, this option is correct.
Based on this information, the correct answers are the telegraph and the telephone.