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PhysicsModern PhysicsRadioactivityMedium2 minPYQ_2023

PhysicsMediumsingle choice

Half life of radio-active element is 1600 years. The fraction of sample remains undecayed after 6400 years will be

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Solution:

$\frac{N}{N _{0}} = (\frac{1}{2})^{\frac{t}{T}}$ Here, $t = 6400$ years and $T = 1600$ years $∴ \frac{N}{N _{0}} = (\frac{1}{2})^{\frac{6400}{1600}} = (\frac{1}{2})^{4} = \frac{1}{16}$

Stream:MHT_CETSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: PYQ_2023

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