Which of the following methods is most likely to be used to determine the absolute age of animal bones that are less than 45,000
1 answer:
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Answer:E
Explanation:
It is given that Energy of gamma ray is E=1.2 Mev
Shielding effect can be measured by measuring the fraction of gamma rays blocked by shield. If certain thickness will able to block half the radiation then to block 75% radiation we need to add same amount of thickness in order to block the remaining radiation.
i.e. fraction is blocked by 10 cm thickness
then remaining radiation is
another 10 cm thickness will block the remaining half radiation i.e.
so total 75 % radiation will be blocked
The answer would be 
.
If we divide
, it gives us 0.005!
Hope this helped! c:
If we divide
Hope this helped! c: