Canonical static concept record

Photoelectric-effect experiments

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Summary

Photoelectron energies depend on light frequency rather than intensity alone and show a threshold frequency, behavior explained by quantized light energy.

Record metadata

Canonical name: Photoelectric-effect experiments
Concept ID: photoelectric_effect_experiments
Content version: 2.3.0
Primary field: Physics
Fields: Physics
Primary domain: Quantum mechanics
Domains: Quantum mechanics, Experiments & observations
Alternate terminology: No alternate terminology is currently authored for this record.
Concept type: Canonical experiment
Status: Observed / performed

Concept sources

Wikipedia — Photoelectric-effect experiments — Photoelectric-effect experiments · encyclopedic reference · source ID wp-physics-photoelectric_effect_experiments
Nobel Prize — The Nobel Prize in Physics 1921 — The Nobel Prize in Physics 1921 · Nobel Foundation scientific reference · source ID nobel-photoelectric
NIST — Historical measurements of fundamental constants, 1900–1920 — Historical measurements of fundamental constants, 1900–1920 · NIST historical reference · source ID nist-historical-constants

Incoming relations (arrows to this concept)

Each relation below ends at this concept.

No direct relations are authored in this direction.

Outgoing relations (arrows from this concept)

Each relation below starts at this concept.

Photoelectric-effect experiments Photon

Permalink to relation

This is an authored directed relation from the source endpoint to the target endpoint.

Relation ID: hist_photoelectric_effect_experiments_to_photon
Relation type: Historically motivated historically-motivated
Direction: source → target
Endpoint roles: source: Historically motivated; target: Historically motivated by
Authored annotation: light quanta

Authored explanation

Einstein’s light-quantum explanation accounted for the threshold and energy relation and helped establish the photon concept.

How to interpret this relation type

The source experiment, observation, anomaly, or problem materially motivated the development, revision, or acceptance of the target concept. Historical influence is not logical derivation; the edge detail states the documented role and avoids retrospective origin myths.

Relation sources

Wikipedia — Photoelectric-effect experiments — Photoelectric-effect experiments · encyclopedic reference · source ID wp-physics-photoelectric_effect_experiments
Nobel Prize — The Nobel Prize in Physics 1921 — The Nobel Prize in Physics 1921 · Nobel Foundation scientific reference · source ID nobel-photoelectric
NIST — Historical measurements of fundamental constants, 1900–1920 — Historical measurements of fundamental constants, 1900–1920 · NIST historical reference · source ID nist-historical-constants

Photoelectric-effect experiments Quantum mechanics

Permalink to relation

This is an authored directed relation from the source endpoint to the target endpoint.

Relation ID: hist_photoelectric_effect_experiments_to_quantum_mechanics
Relation type: Historically motivated historically-motivated
Direction: source → target
Endpoint roles: source: Historically motivated; target: Historically motivated by
Authored annotation: frequency-dependent photoemission

Authored explanation

The photoelectric effect was a central anomaly motivating quantum descriptions of radiation and matter.

How to interpret this relation type

The source experiment, observation, anomaly, or problem materially motivated the development, revision, or acceptance of the target concept. Historical influence is not logical derivation; the edge detail states the documented role and avoids retrospective origin myths.

Relation sources

Wikipedia — Photoelectric-effect experiments — Photoelectric-effect experiments · encyclopedic reference · source ID wp-physics-photoelectric_effect_experiments
Nobel Prize — The Nobel Prize in Physics 1921 — The Nobel Prize in Physics 1921 · Nobel Foundation scientific reference · source ID nobel-photoelectric
NIST — Historical measurements of fundamental constants, 1900–1920 — Historical measurements of fundamental constants, 1900–1920 · NIST historical reference · source ID nist-historical-constants