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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The number of 238 U atoms in an ancient rock equals the number of 206 Pb atoms. The half-life of decay of 238 U is 4.5 * 10^9 years. Estimate the age of the rock assuming that all the 206 Pb atoms are formed

The number of 238 U atoms in an ancient rock equals the number of 206 Pb atoms. The half-life of decay of 238 U is 4.5 * 10^9 years. Estimate the age of the rock assuming that all the 206 Pb atoms are formed

A stable nuclei C is formed from radioactive nuclei A and B with decay constants of lemda 1 and lemda 2 respectively. Initially the number of nuclei of A is N0 and that of B is zero.