# Calculate Its Half Life Period. - Physics

The decay constant of radioactive substance is 4.33 x 10-4 per year. Calculate its half life period.

#### Solution

Here, λ= 4.33 * 10−4 per year

t1/2 = 0.6931/lambda

∴ t1/2 = 0.6931/lambda =0.6931/(4.33*10^-4)

∴t1/2 = 1600.69 years or

t1/2 =0.16*104*365 days

∴t1/2 = 584000days

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