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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 photoelectron is 10 V,then the value of n is?

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Q. 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 e V

. If the stopping potential of the photoelectron is

10 V

n

Q. An electron in the hydrogen atom jumps from excited state 'n' to the ground state. The wavelength of the photoelectron illuminates a photo-sensitive material that has a work function -

ω

(in eV). The stopping potential of the photoelectron is found to be 10 eV. In a sample, electrons fall from 'n' and it is found only 2 lines belong to the visible range. Find value of the work function

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Q. The electron in the hydrogen atom jumps from excited state (

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E_{n} = \frac{13.6}{n^{2}} e V)

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3.57 V

. The threshold frequency of the material is :

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