To show this, we needed to make one critical assumption: that for a thin enough slice of matter, the proportion of light getting through the slice was proportional to the thickness of the slice.
Exactly the same treatment can be applied to radioactive decay.
You will need to ensure that your students can find natural logs using their calculators.
Student questions: Practice calculations Your students should now be able to handle a range of questions involving both e and ln functions.
It uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years old.