The Work Function of a Certain Metal Is 1

question 55

Multiple Choice

The work function of a certain metal is 1.90 eV.What is the longest wavelength of light that can cause photoelectron emission from this metal? (1 eV = 1.60 × 10^-19 J,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

• A)231 nm
• B)14.0 nm
• C)62.4 nm
• D)344 nm
• E)654 nm

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