1801-1804Young optical interference
QUANTUM FOUNDATIONS · HISTORICAL INSTRUMENT
Through Two Slits
A temporal visualizer of the double-slit experiment and its descendants
TEMPORAL SELECTOR
Explore the evolving experiment
Canonical experiment
Theoretical bridge
Experimental descendant
Scale frontier
CANONICAL EXPERIMENT
1801-1804 · Young optical interference
How can two portions of light combine to produce alternating bright and dark bands?
LABORATORY CONTROLS
Parameters
Number of fabricated slits
Audio remains muted until enabled. Frequencies are pedagogical mappings, not measured experimental sound.
COMPARE MODE
Hold two experimental states together
VS
2000Delayed-choice quantum eraser
EMPIRICAL RESULT / INTERPRETIVE LAYER
What changes, and what does not
01
Light becomes an interference problem
02
Read the controls as an apparatus
Slit width sets the diffraction envelope; separation sets fringe spacing; coherence and decoherence limit visibility; path marking constrains the interference term. Presets are historically informed but intentionally bounded for stable browser exploration.
A valid-looking pattern does not prove that an arbitrary parameter combination is experimentally feasible.
Spatial two-slit modelI(x) = sinc²(πax/λL) [1 + V cos(2πdx/λL + φ)] / 2
Matter-wave relationλ = h / p
Duality boundD² + V² ≤ 1
1Alternatives
Two physically available paths contribute probability amplitudes.
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2Phase relation
Relative phase determines constructive and destructive combination.
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3Detection
Individual events are local; the ensemble approaches the probability distribution.
“Conscious observation is required.”
The modeled variables are physical coupling, path marking, entanglement, and environmental decoherence.
“The quantum eraser changes the past.”
Interference appears in coincidence-sorted subsets; the unsorted local signal does not change.
“The experiment proves one interpretation.”
Competing interpretations can preserve the same empirical predictions.
“Large objects have no wavelength.”
Massive objects have a de Broglie wavelength; maintaining observable coherence becomes increasingly difficult.
Operational quantum mechanics
The detector prediction above remains unchanged when this selection changes.
RESEARCH INFRASTRUCTURE
Method, references, and reproducible runs
NO-DATABASE RESEARCH NOTES
Local annotations
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