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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > For a substance the average life for alpha emission is 1620 years and for beta emission is 405 years. After how much time the 1/4 of the material remains after alpha and beta emission

For a substance the average life for alpha emission is 1620 years and for beta emission is 405 years. After how much time the 1/4 of the material remains after alpha and beta emission

For a substance the average life for alpha emission is 1620 years and for beta emission is 405 years. After how much time the 1/4 of the material remains after alpha and beta emission