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JEE Advanced2006PhysicsNuclear PhysicsActual

Half-life of a radio active substance ' A ' is 4 days. The probability that a nucleus will decay in two half-lives is

Options

  1. A1 4
  2. B3 4
  3. C1 2
  4. D1

Correct answer

B. 3 4

Step-by-step solution

After two half lives 1 4 th fraction of nuclei will remain undecayed. Or, 3 4 th fraction will decay. Hence, the probability that a nucleus decays in two half lives is 3 4 .

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