Radioactivity warning symbol in smoke alarm

Radioactivity warning symbol in smoke alarm

C038/6823 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 51.0MB

Downloadable file size: 3.4MB

Price image Pricing

Please login to use the price calculator


Credit: MARTIN BOND/SCIENCE PHOTO LIBRARY

Caption: Radioactivity warning symbol in smoke alarm. Close up of the inside of an ionisation-type smoke alarm, showing a trefoil radiation symbol and details of the alarm's radioactive source. The radiation produced by this radioactive source ionises the air between two charged metal plates, causing a small flow of electricity. Smoke disrupts this, triggering the alarm. The labelling on this smoke alarm states that it contains 0.9 microcuries (Ci) of the radioactive element americium-241. This is given at right in a different unit, as 33,000 becquerals (Bq). The central circular grey area (with the symbol and contents information) is 24 millimetres in diameter.

Release details: Model release not required. Property release not required.

Keywords: 2018, 21st century, 241am, am, am-241, americium 241, americium-241, becquerals, bq, chemical element, chemistry, ci, close-up, curies, detail, fire safety, household item, ionisation, ionising, ionising ionisation smoke fire alarm detector radioactive material, ionization, ionizing, isotope, physical, physics, radiation, radiation symbol, radioactivity, safety, smoke alarm, technological, technology, trefoil

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.