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A radioactive isotopes has a half …

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A radioactive isotopes has a half life of 10 years . How long will it rake for the activity to reduced to 3.125%

    • Posted by Sneha Kaushik 6 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Sayeda Iram Ateeq 6 years, 10 months ago

    R/Ro = N/No = (1/2)^n Given- R/Ro=3.125% & T=10yrs R/Ro= (1/2)^n 3.125/100= (1/2)^n 1/32= (1/2)^n (1/2)^5= (1/2)^n 5=n As we know that, n= t/ T then, t= T×n t=10×5=>50yrs Hence, the radioactive isotope will give 50yrs to reduce to 3.125%.

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