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PhysicsModern PhysicsRadioactivityEasy2 minPYQ_2020

PhysicsEasysingle choice

The half-life of $^{131} I$ is 8 days. Given a sample of $^{131} I$ at time $t = 0$ , we can assert that

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Answer:

Solution:

Number of nuclei decreases exponentially
$N = N_{0} e^{- λ t}$ and rate of decay $(- \frac{d N}{d t}) = λ N$
Therefore, decay process lasts upto $t = \infty$ .
Therefore, a given nucleus may decay at any time after $t = 0$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: PYQ_2020

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