photobeam

photobeam
A beam of light whose interruption triggers a warning or a mechanism (such as a door)

Wikipedia foundation.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • PBQ — Painted Bride Quarterly (Community » Media) * Pittsburgh Bible Quizzing (Community » Religion) * Pimenta Bueno, RO, Brazil (Regional » Airport Codes) * Prism Brass Quintet (Community » Music) * PhotoBeam Quantum (Academic & Science » Physics) …   Abbreviations dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”