Научна лаборатория

Decay constant

Convert half-life into the exponential decay constant.

Start with the idea

This calculator is a scientific workspace. Read the quantities and units first; use the equation only after the physical meaning is clear.

λ = ln2/T½

Reference constant used by this model where applicable: 0.6931471805599453. Keep SI units consistent before interpreting a numerical result.

—

Result uses the reciprocal of the time unit entered.

Mendeleev

Before trusting the result, ask whether the units and order of magnitude make sense. A calculator cannot rescue a wrong physical model.

Go deeper

Core Science · Science paths

Primary reference spine: ·

How to use this page

Start by identifying the quantity, element or phenomenon being studied, then connect it with a concrete situation. A scientific formula becomes much easier to understand once every term and unit has a clear physical meaning.

Mendeleev’s habit: always check the order of magnitude. A calculation can look correct while giving a physically impossible result when a unit has been forgotten or converted incorrectly.

Радиоактивност