What Is the Longest Wavelength of Light That Can Cause

question 5

Multiple Choice

What is the longest wavelength of light that can cause photoelectron emission from a metal that has a work function of 2.20 eV? (1 eV = 1.60 × 10^-19 J,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

• A)417 nm
• B)257 nm
• C)344 nm
• D)565 nm
• E)610 nm

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