Clarke joined the RAF as a radar specialist, serving primarily in ground control radar. He worked on Ground Controlled Approach (GCA) radar during this period, which involved guiding aircraft to safe landings in poor visibility. This experience provided him with valuable technical knowledge and insights into emerging technologies.

While still serving in the RAF, Clarke published the paper 'Extra-Terrestrial Relays' in "Wireless World". This groundbreaking paper outlined the concept of using geostationary satellites for communication, an idea that would revolutionize global communication and earn him the title of 'Father of Satellite Communication'.

Following his discharge from the RAF, Clarke enrolled at King's College London to study mathematics and physics. He continued to write and develop his ideas about space exploration and technology.

Clarke graduated from King's College London with a First Class Honours degree in mathematics and physics, solidifying his scientific foundation for his future endeavors.

Clarke decided to pursue writing full-time, selling his stories and articles to science fiction magazines. This marked the beginning of his prolific career as a science fiction author and futurist.