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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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