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The Work Function of a Particular Metal Is 4.20×10−19 J4.20 \times 10 ^ { - 19 } \mathrm {~J}

Question 3

Multiple Choice

The work function of a particular metal is 4.20×10−19 J4.20 \times 10 ^ { - 19 } \mathrm {~J} What is the photoelectric cutoff (threshold) wavelength for this metal? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s)


A) 473 nm
B) 308 nm
C) 393 nm
D) 554 nm

Correct Answer:

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