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The threshold frequency of a material is...

The threshold frequency of a material is `2xx10^14` Hz. What is its work function in eV ?

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` phi _(0) = hv_(0) 6.62 xx 10^(-34) xx 2 xx 10^(14) J`
` = 1.324 xx 10^(-19) J`
` = (1.324 xx 10^(-19))/(1.6 xx 10^(-19)) eV = 0.8275 eV `
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