Categories > Nuclei > Radioactivity > Half lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes. Initially the sample of A and B have equal number of nuclei. After 80 minutes, the ratio of remaining number of A and B nuclei is

Nuclei

Question: Half lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes. Initially the sample of A and B have equal number of nuclei. After 80 minutes, the ratio of remaining number of A and B nuclei is


1) 1 : 16
2) 4 : 1
3) 1 : 4
4) 1 : 1
Solution: Explanation: No Explanation
Radioactivity Modern Physics

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