Becquerels are not things that you find, they are a quantity that you measure. it measures total radioactivity of a sample.
http://en.wikipedia.org/wiki/Becquerel
You could use a film "badge" but perhaps you consider that a radiation meter. It measures total exposure, which you would have to divide by time to get Bq.
Henri Becquerel actually used film to discover radioactivity by accident.
how do you find a becquerel in a radioactive element without a radiation meter?
1 answer