Which pioneer scientist used radio waves to transmit signals over distance of several kilometres in the 1980s?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Guglielmo Marconi.
In the 1980s, it was actually Guglielmo Marconi who pioneered the use of radio waves to transmit signals over several kilometers. Marconi's experiments and developments in wireless telegraphy laid the foundation for modern radio communication.
He successfully sent the first transatlantic radio message in 1901, demonstrating the practicality and potential of wireless communication over long distances.