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Question #94353
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What is the threshold frequency of a metal with work function 2.16 eV?
A. 3.89 × 10¹⁴ Hz
B. 4.31 × 10¹⁴ Hz
C. 4.73 × 10¹⁴ Hz
D. 5.15 × 10¹⁴ Hz
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