When light of wavelength 5000 Å falls on a metal surface whose photoelectric work function is 1.9 eV, the kinetic energy of the most energetic photoelectrons is
A. 0.59 eV
B. 1.39 eV
C)1.59eV
D)2.59eV.
Answer:A
When light of wavelength 5000 Å falls on a metal surface whose photoelectric work function is 1.9 eV, the kinetic energy of the most energetic photoelectrons is
A. 0.59 eV B. 1.39 eV C)1.59eV D)2.59eV.