How do Smoke Detectors Work

→Subscribe for new videos every day! http://bit.ly/todayifoundoutsubscribe →Why Do Superheroes Wear Their Underwear on the Outside?: http://bit.ly/1Ow7J0K Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from Today I Found Out: Who was the Real Mother Goose? http://bit.ly/1KmiHHE Why Toilet Paper is White http://bit.ly/1SE87uL Why Superheroes Wear Their Underwear On The Outside http://bit.ly/1HLvFLb In this video: At their core, smoke alarms are very simple devices that need only two functions: a way of detecting smoke and a way of alerting people to the problem. From new technology involving lasers to old world technology that relies on a lonely individual sitting in a tower on the side of a mountain just waiting to see smoke, all do the same thing in different ways. The two most commonly used smoke alarms (mainly because they are inexpensive) are photoelectric and ionization detector alarms. Want the text version? http://www.todayifoundout.com/index.php/2014/01/happen-froze-water-container-strong-water-couldnt-expand-ice/ Resources/Further Reading: http://home.howstuffworks.com/home-improvement/household-safety/fire/smoke.htm http://chemistry.about.com/cs/howthingswork/a/aa071401a.htm http://www.epa.gov/radiation/radionuclides/americium.html http://www.systemsensor.com/lifesafety/2011/05/sophisticated-strategic-fire-and-life-safety-in-mission-critical-applications/ http://www.nfpa.org/categoryList.asp?categoryID=278&URL=Research%20&%20Reports/Fact%20sheets/Fire%20protection%20equipment/Smoke%20alarms&cookie_test=1 http://en.wikipedia.org/wiki/File:Fire_Alarm_System_Home.jpg Image Credit (Thank you) http://simplisafe.com/files/images/blog/smoke_detector_diagram_ionization.png http://upload.wikimedia.org/wikipedia/commons/4/47/Glenn_Seaborg_-_1964.jpg http://upload.wikimedia.org/wikipedia/commons/1/16/Americium-241.jpg