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KCET2013PhysicsNuclear Physics

A radioactive substance emits 100 beta particles in the first 2 ~s and 50 beta particles in the next 2 ~s . The mean life of the sample is

Options

  1. A4 ~s
  2. B2 ~s
  3. C2 0.693 ~s
  4. D2 0.693 ~s

Correct answer

C. 2 0.693 ~s

Step-by-step solution

Given, In 1st two seconds 100 particles and in next two seconds 50 particles are emitted array ll & T_ 1 / 2 =2 ~s Hence, & T_ m = T_ 1 / 2 0.693 = 2 0.693 array

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