Assertion: led's light | /r/HasProperty | visible
Facets:
Source sentences:
text: An LED is a semiconductor device that emits visible light when an electric current passes through it.
text: In addition to the LEDs that emit visible light, others are manufactured to emit infra-red.
text: LEDs, although they are still PN junctions, are not made from silicon (which will emit infrared light), and therefore can be made to emit visible light.
text: An LED is a type of diode that emits visible or infrared light proportional to the current passing through it (up to a maximum before it burns out).