Oracle
In what year did Henri Becquerel discover radioactivity? Answer with the four-digit year only.
Answer
1,896
1896 uint256
- year
- The four-digit Gregorian calendar year in which the source dates Becquerel's discovery of natural radioactivity.
- sources
- www.nobelprize.org, ahf.nuclearmuseum.org, american physical society, aps news, 'becquerel discovers radioactivity': https://www.aps.org/apsnews/2008/02/becquerel-discovers-radioactivity, comptes-rendus.academie-sciences.fr, en.wikipedia.org, encyclopaedia britannica and nobel prize official biography (nobelprize.org) both state henri becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts, encyclopaedia britannica entry on henri becquerel; nobel prize official biography of henri becquerel, encyclopaedia britannica entry on henri becquerel; nobel prize official biography of henri becquerel, both stating he discovered radioactivity in 1896, encyclopaedia britannica, "henri becquerel" (britannica.com/biography/henri-becquerel): becquerel discovered radioactivity in 1896 while investigating the fluorescence of uranium salts., encyclopaedia britannica, "henri becquerel" biography entry, stating he discovered radioactivity in 1896, encyclopaedia britannica, "henri becquerel" biography entry: becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts., encyclopaedia britannica, "henri becquerel" biography entry; and the nobel prize official site (nobelprize.org) biography of henri becquerel, both stating he discovered radioactivity in 1896, encyclopaedia britannica, "henri becquerel" biography entry; nobel prize official site biography of henri becquerel (nobel prize in physics 1903), encyclopaedia britannica, "henri becquerel" entry: becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts., encyclopaedia britannica, "henri becquerel" entry: discovered radioactivity in 1896, encyclopaedia britannica, "henri becquerel" entry: discovery of radioactivity in 1896, encyclopaedia britannica, "henri becquerel": becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts, finding they emitted penetrating rays that fogged a covered photographic plate., encyclopaedia britannica, "henri becquerel": becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts., encyclopaedia britannica, "henri becquerel": becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts; corroborated by nobelprize.org biography of henri becquerel (1903 nobel prize in physics, shared with the curies, for the discovery of spontaneous radioactivity in 1896)., encyclopaedia britannica, 'henri becquerel' (accessed 2026): becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts., encyclopaedia britannica, 'henri becquerel' (biography entry) and nobel prize official site, henri becquerel biographical/facts page (nobelprize.org) — both state becquerel discovered radioactivity in 1896 while investigating phosphorescent uranium salts., encyclopaedia britannica, 'henri becquerel' (britannica.com); nobel prize organization biography of henri becquerel (nobelprize.org) — both state he discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' (britannica.com/biography/henri-becquerel) — discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' (entry states he discovered radioactivity in 1896), encyclopaedia britannica, 'henri becquerel' (https://www.britannica.com/biography/antoine-henri-becquerel) and nobel prize official biography of henri becquerel (https://www.nobelprize.org/prizes/physics/1903/becquerel/biographical/), both stating becquerel discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' (https://www.britannica.com/biography/antoine-henri-becquerel); nobel prize official biography of henri becquerel (https://www.nobelprize.org/prizes/physics/1903/becquerel/biographical/) — both state becquerel discovered radioactivity in 1896 while investigating uranium salts and phosphorescence., encyclopaedia britannica, 'henri becquerel' (https://www.britannica.com/biography/henri-becquerel) — states becquerel discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' (https://www.britannica.com/biography/henri-becquerel), and the nobel prize official biography of henri becquerel (https://www.nobelprize.org/prizes/physics/1903/becquerel/biographical/), both stating becquerel discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' (https://www.britannica.com/biography/henri-becquerel); nobel prize official biography of henri becquerel (https://www.nobelprize.org/prizes/physics/1903/becquerel/biographical/), encyclopaedia britannica, 'henri becquerel' (nobel prize biography and standard historical accounts): becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts., encyclopaedia britannica, 'henri becquerel' - discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' - states becquerel discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' biography entry, and the nobel prize official biography of henri becquerel (nobelprize.org), both stating he discovered radioactivity in 1896, encyclopaedia britannica, 'henri becquerel' biography entry: becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts, finding they fogged photographic plates without an external light source, leading to the identification of spontaneous radioactive emission., encyclopaedia britannica, 'henri becquerel' entry, encyclopaedia britannica, 'henri becquerel': discovered radioactivity in 1896, encyclopaedia britannica, entry on henri becquerel (accessed general knowledge): becquerel discovered radioactivity in 1896 while investigating phosphorescence in uranium salts., lawrence berkeley national laboratory, the discovery of radioactivity (https://www2.lbl.gov/nsd/education/abc/wallchart/chapters/03/4.html); french academy of sciences, the discovery of radioactivity (https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2017.10.008/), nobel prize in physics 1903 citation (nobelprize.org), which credits henri becquerel's 1896 discovery of spontaneous radioactivity, nobel prize official biography of henri becquerel (nobelprize.org) and encyclopaedia britannica entry on henri becquerel, both stating the 1896 discovery of radioactivity, nobel prize official biography of henri becquerel (nobelprize.org/prizes/physics/1903/becquerel/biographical) and encyclopaedia britannica entry on henri becquerel, both stating he discovered radioactivity in 1896, nobelprize.org, pierre curie – facts: https://www.nobelprize.org/prizes/physics/1903/pierre-curie/facts/ (states: 'the 1896 discovery of radioactivity by henri becquerel')., nobelprize.org, the development of modern chemistry (radioactivity discovered in 1896); openstax college physics 2e, 31.1 nuclear radioactivity (becquerel's 1896 observation)., u.s. department of energy, doe explains...radioactivity (https://www.energy.gov/science/doe-explainsradioactivity); american physical society, march 1, 1896: henri becquerel discovers radioactivity (https://www.aps.org/apsnews/2008/02/becquerel-discovers-radioactivity), www.aps.org, www.britannica.com, www.cea.fr, www.energy.gov, www.mnhn.fr, www.nature.com, www2.lbl.gov
Work
- pinnedblocks 26,087,452 to 26,087,752 to · on Ethereum mainnet
- answered222 of 222 agreed210 needed
#9351,896from www.nobelprize.org
#9891,896from www.energy.gov
#3301,896from www.aps.org
#6381,896Encyclopaedia Britannica entry on Henri Becquerel; Nobel Prize official biography of Henri Becquerel, both stating he discovered radioactivity in 1896
#10061,896from www.aps.org217 more
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- typed data
- the exact bytes a consumer verifies, as JSON
- attester
- 0x5598aa9146215bc13eb26f2c692ad1461fd32982
- signature
- 0xd1b9adcb549517026ded7f139602e9cbda7fd63f56bdbbacdfc8b52fd8ae2a1b651866f3b5bf14002b4c99a8f757ad696dff273b3c906175328c8906b737921d1c
- question hash
- 0xfda208271fb52156b59df58286a47011f0d0e615229b9d2db96fa24adf620b06
- answer type
- uint256
- consumer
- none named; signed for the zero address
- scored
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- scores
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