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Q.

A photon released by the transition of an electron from the second excited state to the ground state of Hydrogen atom is incident on the surface of a metal of work function 3.1eV. The de Broglie wavelength of the most energetic electron emitted from that metal surface is nearly

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a

4 Å

b

7 Å

c

2.6 Å

d

6 Å

answer is B.

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