Photoelectric Effect: What is the longest wavelength of electromagnetic radiation that will eject photoelectrons from sodium metal for which the work function is 2.28 eV? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 580 nm
B. 499 nm
C. 633 nm
D. 668 nm
E. 545 nm
Answer: E
Physics & Space Science
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