Uses of radiation in radioactive dating
is a technique used by scientists to learn the ages of biological specimens – for example, wooden archaeological artifacts or ancient human remains – from the distant past.
It can be used on objects as old as about 62,000 years.
Also radioisotopes are used in industry, to detect leaking pipes.
To do this, a small amount is injected into the pipe.
It's vital to get the dose correct - too much and you'll damage too many healthy cells, too little and you won't stop the cancer from spreading in time.If smoke enters the alarm, this absorbs the a particles, the current reduces, and the alarm sounds. In paper mills, the thickness of the paper can be controlled by measuring how much beta radiation passes through the paper to a Geiger counter.