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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsRadioactivityEasy2 minPYQ_2019

PhysicsEasysingle choice

The half-life of $^{215} At$ is $100 μ s$ . The time taken for the radioactivity of a sample of $^{215}$ At to decay to $1/1 6^{th}$ of its initial value is

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Solution:

After $n$ half lives $N = N_{0} (\frac{1}{2})^{n}$ $∴^{215}$ At decays to $\frac{1}{16}^{th}$ in 4 half-lives i.e., after $400 μ s$ .

Stream:AIIMSSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: PYQ_2019

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