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A photocathode having a work function of 3.4 eV is illuminated with monochromatic electromagnetic radiation whose...

A photocathode having a work function of 3.4 eV is illuminated with monochromatic electromagnetic radiation whose photon energy is 4.6 eV. What is the threshold (cutoff) frequency for photoelectron production? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ∙ s)

A.9.1 × 1014 Hz

B.1.1 × 1015 Hz

C.1.0 × 1015 Hz

D.2.9 × 1014 Hz 8.2 × 1014 Hz

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