Rutherford scattering experiments
(Redirected from Geiger–Marsden experiments)
The Rutherford scattering experiments were a series of landmark experiments conducted in the early 20th century that led to the development of the Rutherford model of the atom. These experiments were primarily carried out by Ernest Rutherford, Hans Geiger, and Ernest Marsden at the University of Manchester.
Background[edit | edit source]
Before the Rutherford scattering experiments, the prevailing model of the atom was the Thomson model, proposed by J.J. Thomson. This model depicted the atom as a sphere of positive charge with negatively charged electrons embedded within it, similar to "plums" in a "pudding."
The Experiments[edit | edit source]
The experiments were designed to probe the structure of the atom by observing the scattering of alpha particles when they were directed at a thin gold foil. The apparatus consisted of a source of alpha particles, a thin gold foil, and a fluorescent screen to detect scattered particles.
Geiger-Marsden Experiment[edit | edit source]
The first experiment, conducted by Geiger and Marsden under Rutherford's supervision, involved measuring the angles at which alpha particles were scattered after passing through the gold foil. To their surprise, while most particles passed through with little deflection, a small number were deflected at large angles, and some even bounced back.
Results and Interpretation[edit | edit source]
The unexpected results of the experiments led Rutherford to propose a new model of the atom. He suggested that the atom consists of a small, dense, positively charged nucleus surrounded by orbiting electrons. This model explained the large-angle deflections as the result of alpha particles coming close to the dense nucleus.
Significance[edit | edit source]
The Rutherford scattering experiments were pivotal in the development of modern atomic theory. They provided the first evidence for the existence of a nuclear structure within the atom, leading to the abandonment of the Thomson model and paving the way for the Bohr model and later quantum mechanical models.
Related pages[edit | edit source]
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
WikiMD's Wellness Encyclopedia |
Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD