The mean lives of radioactive substances are 
and 
for 
- emission and 
emission respectively. Find out the time during which three-fourth of a sample will decay if it is decaying both by 
emission and 
-emission simultaneously.
Text Solution
Verified by ExpertsThe correct answer is:
C
Let at some instant of time t , number of atoms of he radioactive substance are N . It may decay either by 
-emission or 
-emission. So, we can write,
If the effective decay constant is 
, then
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Which of the following particles are constituents of the nucleus?
The particles which can be added to the nucleus of an atom without changing its chemical properties…
The neutron was discovered by
The energy equivalent of 1 kilogram of matter is about
Nuclear binding energy is equivalent to
If the binding energy of the deutrium is 2.23 MeV. The mass defect given in a.m.u. is