Photoelectric Effect Using Stopping Potential: A monochromatic light beam is incident on the surface of a metal having a work function of 2.50 eV. If a 1.0-V stopping potential is required to make the electron current zero, what is the wavelength of light? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 355 nm
B. 423 nm
C. 497 nm
D. 744 nm
Answer: A
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