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प्रश्न
Define the term decay constant of a radioactive substance.
व्याख्या
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उत्तर
Decay constant: Let the number of nuclei of a radioactive substance present at any time be N. Decay of the number of nuclei (ΔN) in a small interval of time (Δt) is proportional to N and Δt.
ΔN ∝ NΔt
Or, ΔN = −λ NΔt
The proportionality constant A. is known as the decay constant.
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