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What Is the Cutoff (Threshold) Frequency for a Metal Surface $10^{15}$

Question 43

Multiple Choice

What is the cutoff (threshold) frequency for a metal surface that has a work function of 5.42 eV? (1 eV = 1.60 × 10^-19 J, h = 6.626 × 10^-34 J ∙ s)

A) 1.31 × $10^{15}$ Hz
B) 2.01 × $10^{15}$ Hz
C) 3.01 × $10^{15}$ Hz
D) 5.02 × $10^{15 }$ Hz
E) 6.04 × $10^{15 }$ Hz

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