Photoelectric EffectHard
Question
The decay constant of a radio active substance is 0.173 (years)-1. Therefore:
Options
A.Nearly 63% of the radioactive substance will decay in (1/0.173) year.
B.half life of the radio active substance is (1/0.173) year.
C.one -forth of the radioactive substance will be left after nearly 8 years.
D.half of the substance will decay in one average life time.
Solution
Use approximation ln2 = 0.692
Given λ = 0.173
T1/2 =
Also N0 − N = N0 e−λt
For t =
N0 − N =
= 0.37
Given λ = 0.173
T1/2 =
Also N0 − N = N0 e−λt
For t =
N0 − N =
= 0.37Create a free account to view solution
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