In this video Paul Andersen explains how a radioactive nuclei can decay by releasing an alpha, beta, or gamma particle. The exact moment of decay for each nuclei can not be determined but probability is useful in predicting the...

This video covers:

- How radioactive decay
works
- What acti
vity means
- The two definitio
ns of half-life
- How to show radioact
ive decay on a graph
- How we can find the count rate
with a...

This video is a lecture on half-lives and how to quantify the number of radioactive decays that occur over a given time period. The video explains that radioactive decay is a random process with equal probabilities for each outcome. The...

When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating....