A mixture consists of two radioactive materials and with half lives of and respectively. Initially, the mixture has of andof . The active amount of the two in the mixture will become equal after?
Explanation for correct option:
(D)
Step 1: Formula:
Step 2: Equalising the amount:
Step 3: Finding the time required to achieve equal amount:
So, this is the correct option.
Explanation for incorrect options:
Since, the correct answer is . Therefore, the options (A), (B) and (C) stand incorrect.
Hence, the correct option is (D)