Film Badge (Dosimeter)
- All the α-particle, β-particle and γ-ray can be detected by a photograph film.
- The ionisation effect by the radioactive rays will decompose silver bromide crystal on the film.
- Films are kept in the badges worn by workers as a tracer device of radioactive rays.
- The main disadvantages of using a film as a radioactive tracer is that it needs to be processed in order to prove the presence of radioactive rays)