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Activity (A) of a
radioactive sample is the number of disintegrations occurring per unit
| = Nl
Curie: The activity of a radioactive sample is said to be one
curie (1 ci)
if 3.7 × 1010 disintegrations occur per second.
Other unit: The SI unit : bequerel (Bq)
and Energy Relation
to Einstein's special theory of relativity
= mass of particle when it is at rest
= velocity of particle
= velocity of light
= m0c2 + k
= rest energy of particle
= kinetic energy of particle.