Starting with a sample of pure ⁶⁶Cu,7/8 of it decays into Zn in 15 minutes. The corresponding half life is

Atoms and Nuclei: JEE Main 2005 Physics question

JEE Main 2005 · Annual, Paper 1 · Q6077

JEE Main 2005Annual, Paper 1PhysicsEasyAtoms and Nuclei183× since 2002

Starting with a sample of pure

{}^{66}Cu,{7 \over 8}

of it decays into

Zn

15

minutes. The corresponding half life is

JEE Main 2005 · Annual, Paper 1 · Q6077

JEE Main 2005Annual, Paper 1PhysicsEasyAtoms and Nuclei183× since 2002

Starting with a sample of pure

{}^{66}Cu,{7 \over 8}

of it decays into

Zn

15

minutes. The corresponding half life is