Name the physical quantity whose SI unit is becquerel (Bq). How is this quantity related to (i) disintegration constant, (ii) half-life, and (iii) mean-life of the radioactive element?

Solution

Radioactivity is the physical quantity whose SI unit is Bq.

(i) Relation between radioactivity and disintegration constant is as follows:

R = R₀e^-λt or R = λN

where, λ is disintegration constant.

(ii) Relation between radioactivity and half life is,

$R = [\frac{0.693}{T_{1 / 2}}] N$

where T_1/2 is the half-life period.

(iii) Relation between radioactivity and mean-life of the element is,
$R = [\frac{1}{T_{m}}] N$

where, T_m is the mean-life.

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Wave Optics

Name the physical quantity whose SI unit is becquerel (Bq). How is this quantity related to (i) disintegration constant, (ii) half-life, and (iii) mean-life of the radioactive element?

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