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Find threshold frequency, in $\mathrm{Hz}$, of a metal if it emits an electron with kinetic energy of $2.74 \times 10^{-19}~\mathrm{J}$ when illuminated with light with frequency of $1.49 \times 10^{15}~\mathrm{Hz}$.

I am not sure what to do with this.

DHMO
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Naomi Carrion
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  • Welcome to this site. Note that this site is not for homework help. For [tag:homework] questions, please include your attempt, or else your question might be closed as off-topic. – DHMO Jan 25 '17 at 09:40
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    What have you tried? Take a shot at it anyway ;) You'll be much more likely to get help when people see you've put some effort into it. – airhuff Jan 25 '17 at 09:48

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