Given that work function for sodium metal is 1.82eV,,calculate the threshold frequency for sodium.

asked Aug 16, 2022 37.3k views

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3 votes

$\\ \sf\Rrightarrow E=hv$

$\\ \sf\Rrightarrow v=(E)/(h)$

$\\ \sf\Rrightarrow v=(1.82* 1.6* 10^(-19)J)/(6.626* 10^(-34)Js)$

$\\ \sf\Rrightarrow v=0.439* 10^(15)s^(-1)$

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