Photoelectric Effect: A photocathode whose work function is 2.9 eV is illuminated with white light that has a continuous wavelength band from 400 nm to 700 nm. What is the range of the wavelength band in this white light illumination for which photoelectrons are not produced? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 430 nm to 700 nm
B. 400 nm to 480 nm
C. 430 nm to 480 nm
D. 400 nm to 430 nm
E. 480 nm to 700 nm
Answer: A
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