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If an electron in a hydrogen atom, revolving in its second excited state (having radius ). what is the de-Broglie wavelength of this electron?
(a)
(b)
(c)
(d)

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Important Questions on Modern Physics
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The de-Broglie wavelength associated with the electron in the level is:

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( being velocity of light)

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List-I | List-II | ||
A | Franck-Hertz Experiment | (i) | Particle nature of light |
B | Photo-electric experiment | (ii) | Discrete energy levels of the atom |
C | Davison-Germer Experiment | (iii) | Wave nature of electron |
(iv) | Structure of atom |

