Becquerel and Curies are both the activity of radioactive decay. But 1 Cu is 37,000,000 Bq (so the quantity can be more easily understood). If I say you have 0.000000000648 Cu of Radon - you think 'meh, big deal'... But 240 Bq when the limit is 200 - easier to understand the issue.
Becquerel and Curies are both the activity of radioactive decay.
But 1 Cu is 37,000,000 Bq (so the quantity can be more easily understood). If I say you have 0.000000000648 Cu of Radon - you think 'meh, big deal'... But 240 Bq when the limit is 200 - easier to understand the issue.