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Q.

A light from paschen series of hydrogen atom is able to eject photoelectrons from a metal, then the work function of the metal is,

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a

3.4 ev

b

0.85 ev

c

1.1 ev

d

1.54 ev

answer is B.

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Detailed Solution

$\begin{array}{l} W_{0} = \frac{h c}{λ_{0}} \\ \frac{1}{λ_{0}} = R z^{2} [\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}}] \end{array}$

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