In 1946, the U.S. Army sent a radar pulse toward the Moon; its echo returned 2.5 seconds later and proved radio signals could reach beyond Earth

In 1946, military engineers achieved a groundbreaking milestone by bouncing a radar signal off the Moon. This experiment demonstrated that radio waves could penetrate beyond Earth’s atmosphere, utilizing modified World War II radar. The successful capture of the faint lunar echo was crucial, setting the stage for advances in radar astronomy and space communications, ultimately paving the way for future satellite and lunar expeditions.
Read more at the source

Disclaimer: The content of this post is sourced from external sites and is for informational purposes only. All rights and credits belong to the original authors and publishers.