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Photoelectric work function for a surfac...

Photoelectric work function for a surface is 2.4 eV. Light of wavelength `6.8 xx 10^(-7)`m shines on the surface. Find the frequency of incident light and also the threshold frequency. Will there be photoelectric emission or not ?

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The correct Answer is:
`v =4.41 xx 10^(14)Hz,v_(0)=5.82 xx 10^(14) Hz`, no photoelectric emission occurs as `v lt v_(0)`
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SL ARORA-ELECTRONS AND PHOTONS-TYPE D : Problem For Self Practice
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