When radiation of a wavelength 2.45 x 10^-7 m falls on metal surface, the maximum kinetic energy of the emitted electrons is found to be 6.73 x 10^-19. What is the value in J of the work fuction of the metal. c = 2.998 x 10^8 m/s, h = 6.626 x 10^-34.
Below are the different answer choices
A. 2.64 x 10^-17
B. 1.49 x 10^-19
C. 1.38 x 10^-19
D. 1.83 x 10 ^-17
E. 8.11 x 10 -19