JEE Main 2015 Physics question

The de-Broglie wavelength associated with the electron in the level is:

(1)Half of the de-Broglie wavelength of the electron in the ground state
(2)Four times the de-Broglie wavelength of the electron in the ground stateCorrect
(3)th of the de-Broglie wavelength of the electron in the ground state
(4)Two times the de-Broglie wavelength of the electron in the ground state

Answer: (2)

Solution

Bohr's quantisation condition can be rewritten as , i.e. the th orbit contains exactly de-Broglie wavelengths. Since , we get $λ_n =

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Question ID VK-115341