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Question #94410
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What is the threshold frequency of a metal if photoelectric emission begins at 4.73 × 10¹⁴ Hz?
A. 4.31 × 10¹⁴ Hz
B. 4.52 × 10¹⁴ Hz
C. 4.73 × 10¹⁴ Hz
D. 4.94 × 10¹⁴ Hz
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