In Shedding Light on Nuclear Radiation Episode 5: Half-Life and Activity, we examine how quickly radiation is given off by radiation-emitting substances. Some radioactive substances emit lots of radiation in a short amount of time while others emit radiation very slowly. These different rates of emission can be expressed in a quantitative way using the concepts of "half-life" and "activity".

Originally released by Liacos Educational Media, 2023. Streaming video file encoded with permission for digital streaming by Infobase on February 24, 2023.