photophone
E44558
The photophone was an early communication device that transmitted sound on a beam of light, serving as a precursor to modern fiber-optic technology.
All labels observed (1)
| Label | Occurrences |
|---|---|
| photophone canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T351534 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: photophone Context triple: [Alexander Graham Bell, invented, photophone]
-
A.
Optica
Optica is a leading scientific society dedicated to advancing the study and application of optics and photonics worldwide.
-
B.
Cyber-shot
Cyber-shot is Sony's line of compact digital still cameras known for their portability, advanced imaging features, and consumer-friendly design.
-
C.
Periscope
Periscope was a live video streaming mobile app that allowed users to broadcast and watch real-time video from around the world.
-
D.
Limelight
Limelight is a 1952 drama film written, directed by, and starring Charlie Chaplin, in which he portrays a faded music-hall comedian who befriends and mentors a young ballerina.
-
E.
Luce
Luce is a surname most notably associated with Henry Luce, the influential American magazine magnate and co-founder of Time Inc.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: photophone Target entity description: The photophone was an early communication device that transmitted sound on a beam of light, serving as a precursor to modern fiber-optic technology.
-
A.
Optica
Optica is a leading scientific society dedicated to advancing the study and application of optics and photonics worldwide.
-
B.
Cyber-shot
Cyber-shot is Sony's line of compact digital still cameras known for their portability, advanced imaging features, and consumer-friendly design.
-
C.
Periscope
Periscope was a live video streaming mobile app that allowed users to broadcast and watch real-time video from around the world.
-
D.
Limelight
Limelight is a 1952 drama film written, directed by, and starring Charlie Chaplin, in which he portrays a faded music-hall comedian who befriends and mentors a young ballerina.
-
E.
Luce
Luce is a surname most notably associated with Henry Luce, the influential American magazine magnate and co-founder of Time Inc.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
invention
ⓘ
optical communication device ⓘ telecommunications device ⓘ |
| alsoKnownAs | radiophone using light (historical description) ⓘ |
| category | historical communication technology ⓘ |
| communicationPrinciple | modulation of light intensity by sound ⓘ |
| demonstratedBy | Alexander Graham Bell ⓘ |
| demonstrationLocation | Washington, D.C. ⓘ |
| demonstrationYear | 1880 ⓘ |
| era | late 19th century ⓘ |
| field |
electrical engineering
ⓘ
optics ⓘ telecommunications ⓘ |
| historicalSignificance |
early example of optical wireless communication
ⓘ
first device to achieve wireless voice communication via light ⓘ |
| inspired | later optical communication research ⓘ |
| inventedBy |
Alexander Graham Bell
ⓘ
Charles Sumner Tainter ⓘ |
| inventionYear | 1880 ⓘ |
| inventorAffiliation |
Bell Telephone Company
ⓘ
Volta Laboratory ⓘ |
| limitation |
requirement for line-of-sight
ⓘ
sensitivity to atmospheric disturbances ⓘ sensitivity to weather conditions ⓘ |
| modulatorType |
thin reflective diaphragm
ⓘ
vibrating mirror ⓘ |
| operatingRange | several hundred meters ⓘ |
| outputConversion |
electrical signal to sound
ⓘ
light to electrical signal ⓘ |
| patentFiledBy |
Alexander Graham Bell
ⓘ
Charles Sumner Tainter ⓘ |
| patentFiledIn |
United States of America
ⓘ
surface form:
United States
|
| patentFiledYear | 1880 ⓘ |
| powerSource |
artificial light
ⓘ
sunlight ⓘ |
| precursorTo |
fiber-optic communication
ⓘ
optical telecommunication systems ⓘ |
| receiverMaterial | selenium ⓘ |
| receiverType |
photoelectric cell
ⓘ
selenium cell ⓘ |
| relatedTo |
fiber-optic cable
ⓘ
free-space optical communication ⓘ telephone ⓘ |
| signalCarrier | visible light ⓘ |
| transmissionType | wireless ⓘ |
| transmits |
sound
ⓘ
voice ⓘ |
| usesMedium | light beam ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: photophone Description of subject: The photophone was an early communication device that transmitted sound on a beam of light, serving as a precursor to modern fiber-optic technology.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Alexander Graham Bell