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Which of the following is used in the Davisson – Germer experiment?

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Which of the following is used in the Davisson – Germer experiment?

(a) Double slit

(b) Single slit

(c) Electron gun

(d) Electron microscope

This question was addressed to me in final exam.

The query is from Davisson and Germer Experiment topic in chapter Dual Nature of Radiation and Matter of Physics – Class 12

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Right choice is (c) Electron gun

The explanation is: Davisson – Germer experiment uses an electron gun to produce a fine beam of electrons which can be accelerated to any desired velocity by applying a suitable voltage across the gun. The others mentioned do not find an application here.

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