Nuclear Physics And Radioactivity Question 389
Question: A radioactive material has a half-life of 8 years. The activity of the material will decrease to about 1/8 of its original value in [UPSEAT 2005]
Options:
A) 256 year
B) 128 year
C) 64 year
D) 24 year
Show Answer
Answer:
Correct Answer: D
Solution:
$ \frac{A}{A_{0}}={{( \frac{1}{2} )}^{t/{T_{1/2}}}} $
Þ $ \frac{1}{8}={{( \frac{1}{2} )}^{t/8}} $
Þ $ t=24,years. $
BETA
