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  • Which experiment was the first to experimentally verify the existence of discrete energy states in atoms?Option: 1 Davisson-Germer experime

Which experiment was the first to experimentally verify the existence of discrete energy states in atoms?

Option: 1

Davisson-Germer experiment

 


Option: 2

Photoelectric effect experiment


Option: 3

Millikan's oil drop experiment

 


Option: 4

Frank Hertz experiment


Answers (1)

best_answer

The Davisson-Germer experiment and the Frank Hertz experiment. The Davisson-Germer experiment demonstrated the wave nature of electrons through electron diffraction, and verified the de Broglie equation. The experimental setup included an electron gun, collimator, target, and detector. The scattered electrons produced a diffraction pattern and the dual nature of matter was verified. The Frank Hertz experiment verified the existence of discrete energy states in atoms, and the graph of collected current vs accelerating voltage showed a characteristic 4.9 \mathrm{~V} peak due to the ionization of mercury atoms.

Therefore, the Frank Hertz experiment was the first experimental verification of the existence of discrete energy states in atoms. It showed that atoms can absorb and emit energy only in discrete amounts, and not in a continuous manner.

Posted by

Pankaj Sanodiya

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