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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 31 - Nuclei > 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 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 the material is λ then