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Electron, Photon, Photoelectric Effect and X-Rays — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectron, Photon, Photoelectric Effect and X-Rays1 Mark
Question
The photoelectric threshold wavelength for a metal surface is 6600 Å. The work function for this is(a) 1.87 V(b) 1.87 eV(c) 18.7 eV(d) 0.18 eV
       
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Answer

(b) 1.87 eV

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