The story
From photo- + interrupter.
Etymology from Wiktionary, CC BY-SA 4.0.
photointerrupter
Today it means: An optical device that acts as a switch when a beam of light is blocked by a foreign object Full definition →
Today it means: An optical device that acts as a switch when a beam of light is blocked by a foreign object Full definition →
From photo- + interrupter.
Etymology from Wiktionary, CC BY-SA 4.0.