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In a radioactive material the activity a...

In a radioactive material the activity at time `t_1` is `R_1` and at a later time `t_2`, it is `R_1`. If the decay constant of the material is `lamda`, then

A

`R_1=R_2e^(-lamda(t_1-t_2))`

B

`R_1=R_2e^(lamda(t_1-t_2))`

C

`R_1=R_2`

D

`R_1=R_2(t_2//t_1)`

Text Solution

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The correct Answer is:
A
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