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42 An electron in the hydrogen atom jumps from excited state n to the ground...

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42 An electron in the hydrogen atom jumps from excited state n to the ground state The wavelength so emitted illuminates a photosensitive material having work function 2 75 eV If the stopping potential of the photoelectron is 10 V then the value of n is b 2 a 5 c 3 d 4 CBSE Final 2011

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