Physics for IGCSE & O level - Atoms And Radioactivity (Section 3 - No. 19)
What does the term 'activity' of a radioactive source refer to?
The time it takes for the source to decay completely.
The rate at which the source emits radiation.
The mass of the radioactive material.
The energy of the emitted radiation.
Explanation
Activity is the rate of radiation emission.
Comments (0)
