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The variation of stopping potential (V 0 ) as a function of the frequency (  ) of the incident light for a metal is shown in figure. The work function of the surface is - 3 2 1 0 Stopping Potential (V 0 ) volt 1 2 3 4 5 6 7 8 9 10  (× 10 14 Hz)

1. 2.98 eV
2. 2.07 eV
3. 1.36 eV
4. 18.6 eV

Correct answer: 2.07 eV

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