Quantum mechanical model of the atom
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The radiations obtained from deexcitation of H-atom from second orbit to 1st, striked on a metal of work function 4.2 eV. The wavelength (in ) of ejected electron having maximum kinetic energy is:
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At 200°C,hydrogen molecule have velocity 2.4 × 105 cm s-1. The de Broglie wavelength in this case is approximately
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