The radioactivity due to `C-14` isotope (half-life = 6000 years) of a sample of wood form an ancient tomb was found to be nearly half that of fresh wood. The bomb is there for about

The radioactivity due to C_14 isotope of same of wood from an ancient tomb was found to be nearly halkf of fresh wood the tomb is therefore about (half life =6000 years)

An archaeologist analyses the wood in a phehistoric structure and finds that C^14 (Half-life = 5700 years) to C^12 only one-fourth of that found in the cells buried plants. The age of the wood is about

An archaeologist analyses the wood in a phehistoric structure and finds that C^14 (Half-life = 5700 years) to C^12 only one-fourth of that found in the cells buried plants. The age of the wood is about

The average life of a radioactive sample is 2 years. Its half-life in years is