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Activity of a radioactive substance is A...

Activity of a radioactive substance is `A_(1)` at time `t_(1)` and `A_(2)` at time `t_(2)(t_(2) gt t_(1))` , then the ratio of f`(A_(2))/(A_(1))` is:

A

`(t_(2))/(t_(1))`

B

`e^(-lamda(t_(1)+t_(2)))`

C

`e((t_(1)-t_(2))/(lamda))`

D

`e^(lamda(t_(1)-t_(2)))`

Text Solution

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The correct Answer is:
D
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