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NEET2007PhysicsNuclear PhysicsActual

Two radioactive substances A and B have decay constants 5 and respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1 / e)^2 after a time interval.

Options

  1. A4
  2. B2
  3. C1 2
  4. D1 4

Correct answer

C. 1 2

Step-by-step solution

According to the question aligned N_A N_B & = 1 e^ 4 t 1 e^ 4 t & = 1 e^2 t & = 1 2 aligned

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