What did Hershey and Chase demonstrate regarding radioactive tracers?

Back in the day people were still learning about infections and how viruses were reproducing. Hershey & chase did an experiment forget the name but they did a radioactive labeling technique to do two different types of labeling. The one type was a coat labeling and the other was an internal labeling. After both types had their radioactive labels they allowed them to infect or reproduce. They then took the infected and found the radioactive labeling only in the offspring with the internal labeling. This told them that the transferring of reproducing material was not the protein material on the coat but was the reproducing material on the inside "DNA" Deoxyribo-Nucleic Acids