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Thomas Young's double-slit experiment demonstrated light's wave nature.

the verdict
CONTESTED PARTIAL
Recorded sources
6 sources for · 2 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Thomas Young's double-slit experiment demonstrated light's wave nature?

Partly. Reference and educational sources state that Thomas Young's double-slit experiment revealed an interference pattern and supported the wave theory of light. A set of 2024-2025 papers (apparently one work in several versions) argues the fringes come from diffraction at slit walls rather than wave interference, challenging the conventional reading.

Verdict: CONTESTED PARTIAL · 6 sources for, 2 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 6
Double-slit experiment
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Double-slit experiment. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Double-slit_experiment

Evidence against · 2
The Nature of Light: What Hidden Behind Young's Double-Slit Experiment?
2021
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Xiuqing, H. (2021). The Nature of Light: What Hidden Behind Young's Double-Slit Experiment?. zenodo.org. https://doi.org/10.5281/zenodo.4570345

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More for · 5
Young's interference experiment
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Young's interference experiment. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Young%27s_interference_experiment

A Variant of Young's Double Slit Experiment for Educational Purposes
2011
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Francois, H. & Alain, S. (2011). A Variant of Young's Double Slit Experiment for Educational Purposes. eric.ed.gov. https://doi.org/10.1088/0031-9120/46/1/004

A Student-Centered, Inquiry-Based Approach to Young's Double-Slit Experiment (and Other Investigations of Light's Wave Character)
2017
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Z., M. D. (2017). A Student-Centered, Inquiry-Based Approach to Young's Double-Slit Experiment (and Other Investigations of Light's Wave Character). eric.ed.gov. https://eric.ed.gov/?id=EJ1142639

Macmillan Encyclopedia of Physics
1996
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Rigden, J. S. (1996). Macmillan Encyclopedia of Physics. books.google.com. http://books.google.com/books?id=5rIRAQAAMAAJ&dq=Thomas+Young%27s+double-slit+experiment+demonstrated+light%27s+wave+nature.&hl=&as_pt=BOOKS&source=gbs_api

Double Slit Experiment from Nano to Femto Scale
2025
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Double Slit Experiment from Nano to Femto Scale. (2025). doi.org. https://doi.org/10.48550/arxiv.2509.13924

More against · 1
Revisiting the double-slit experiment of light: from wave theory to pulse theory
2024
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lyu, z., Lv, N., & Lyu, T. (2024). Revisiting the double-slit experiment of light: from wave theory to pulse theory. doi.org. https://doi.org/10.1364/opticaopen.27255981.v1

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