The threshold wavelength for the ejection of electron from metal is 330 nm, then work function for the photoelectric emission is

The threshold wavelength for the ejection of electron from metal is 33

1.	The threshold wavelength for the ejection of electron from metal is 330 nm, then work function for the photoelectric emission is
Answer» `6XX10^(-12)` J `6xx10^(-19)` J `1.2xx10^(-20)` J `1.2xx10^(-18)` J Solution :`W=hv_(0)` `W=(hc)/lambda_(0)=(6.62xx10^(-34)xx3xx10^(8))/(330xx10^(-9))=6xx10^(-19)` J