The de Broglie explanation of Bohr’s quantisation requires the orbit circumference to hold a whole number of ___ wavelengths:

The de Broglie explanation of Bohr’s…

Answer: electron (de Broglie).

A electron (de Broglie)
B the photon type
C the visible-light type
D the sound-wave type

Correct answer: A. electron (de Broglie)

Explanation: A stable orbit fits an integer number of the electron’s de Broglie wavelengths.

Comparison of the Thomson model and the Rutherford model of the atom: in the Thomson plum pudding model alpha particles pass almost straight through a diffuse positive sphere, while in the Rutherford model a concentrated central nucleus deflects some alpha particles through large angles, with the lower panels showing the alpha particle source and gold foil and the observed result of wide-angle scattering

The Geiger–Marsden alpha-scattering result: a few alpha particles bounce back at large angles, which rules out Thomson’s diffuse model and demands a tiny, massive, positively charged nucleus. Image: Kurzon, CC BY 3.0, via Wikimedia Commons.

Concept context

Thomson's plum-pudding model, Rutherford's nuclear model from alpha-scattering, Bohr's postulates and hydrogen spectrum, spectral series (Lyman to Pfund), Rydberg formula, and limitations of each model.

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The de Broglie explanation of Bohr’s quantisation requires the orbit circumference to hold a whole number of ___ wavelengths:

Concept context

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