- #1

wolf1728

Gold Member

- 38

- 5

From what I have interpreted, k = ln (.5) / half-life

whereas λ = ln (2) / half-life.

Have I defined these correctly?

If this is so, the difference between the two is slight.

When putting these into equations, we see:

N

_{t}= N

_{0}*e

^{kt}

N

_{t}= N

_{0}*e

^{-λt}

The

*only*difference seems to be that when using lambda, you have to remember to put the negative sign in the exponent.

It just seems confusing to me that some authors use λ whereas others use "k".