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  • The work function for caesium atom is 1.9 eV. Calculate (b) the threshold frequency of the radiation.

2.51    The work function for caesium atom is 1.9 eV. Calculate (b) the threshold frequency of the radiation.

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best_answer

To find threshold frequency:

W_{o} = h\nu_{o}

Where

h = Planck’s constant

\nu_{o} = threshold frequency

\nu_{o}= \frac{W_{o}}{h}

\nu_{o} =\frac{ [1.9\times1.602\times10^{-19}J] }{[6.626\times10^{-34}Js]}

     = \frac {3.0438\times10^{-19}J} { 6.626\times10^{-34}Js}

     = 4.5937\times10^{14} Hz

Posted by

Divya Prakash Singh

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