When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is
A. 0.65 eV
B. 1.0 eV
C. 1.3 eV
D. 1.5 eV
Answer:B
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is
A. 0.65 eV B. 1.0 eV C. 1.3 eV D. 1.5 eV