In potassium-argon dating, how does the proportion of remaining potassium in a rock or fossil change over time?
2 answers:
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Explanation:
Let the age to be found in years is y.
Hence,
= (\frac{1}{2})^{\frac{y}{5730yr}}
Solve for y as follows.
0.53913 = (\frac{1}{2})^{\frac{y}{5730yr}}
Now, taking log on both the sides as follows
log 0.53913 =
=
z =
= 5107 years
Thus, we can conclude that the time since death is 5107 years.