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###### Padmanabh Das posted an Question
January 15, 2022 • 15:20 pm 30 points
• IIT JAM
• Physics (PH)

# Jam problem# explain isotopic ratio

#Nuclear Physics Problem #please explain what is isotopic ratio .

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• ##### Animesh anand Best Answer

sir why did you take N(0) =51 and Sir what is istopic ratio ?and the answer range is 3.55-3.65

if you take value of ln2 = 0.7 then your answer come in range.second because the ratio of the two isotope is 50.it means if we take potassium be 50x then argon is x .whole potassium is decay into argon,total no.of atom is constant so any time total no.of atom is sum of two so we take N(0)=51.

isotopic ratio is the ratio of two isotope at any instant

I had take ln2=0.693 you should take ln2=0.7

you should consider this example then you better understand

the total at initial time is equal to the sum of two decay isotope at any instant

after that which portion especially you have doubt

I think you should skip now .Go ahead

sir please check this one as well

my way is also correct ,there is not only one method to solve a problem

this method is also the same as I did

N(t ) =50 wala part bata dijiye

at time t the ratio of k/Ar is 50 it means that amount of potassium remain in the decaying process is 50 out of total amount of potassium initially taken

N(t) means the amount remain at time t

N(t) means the amount remain at time t

the solution you posted and my solution both have same equation at end

sir understood thank you

you should accept this answer

sir do not delete the example you shared.

the amount of potassium is 50 times argon at time t

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