it is R2​. If the decay constant of the material is λ

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In a radioactive material the activity at time t1​ is R1​ and at a later time t2​, it is R2​. If the decay constant of the material is λ, then
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In a radioactive material the activity at time t1​ is R1​ and at a later time t2​, it is R2​. If the decay constant of the material is λ, then In a radioactive material the activity at time t1​ is R1​ and at a later time t2​ it is R2​. If the decay constant of [...]
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