Question

benefits and drawback of using radiation in smoke detector

Answer 1

go to this link http://wiki.answers.com/Q/What_are_some_benefits_and_drawbacks_to_using_radioactive_isotopes_in_smoke_alarms_speaking_in_temrs_of_economic_social_and_perhaps_ethical_factors.

Answer 2

go through the presentation.

Answer 3

the above answer only tells about the effects of radiation.
But actually the benefits are it is more accurate and the loss is just simply its expensive and exposure to radiation is harmful to health and it may lead to cancer!!