The work function of a metal surface is quoted as

PHYSICS · Subjective · Fermi University Physics · Scientific Practice & Experimental Methods · Quantities, units and the practice of measurement · Quantities, units and the practice of measurement

Measurement and Method, Ch What a measured value is: quantities, units and the SI

Problem

The work function of a metal surface is quoted as 4.7 eV4.7\ \mathrm{eV}, where the electronvolt is defined by the exact value of the elementary charge, e=1.602 176 634×10−19 Ce = 1.602\,176\,634\times10^{-19}\,\mathrm{C}, so that 1 eV=e×1 V1\,\mathrm{eV} = e\times1\,\mathrm{V}. Express the work function in joules.

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