The photoelectric threshold of Tungsten is 2300 `A^@`. The energy of the electrons ejected from the surface by ultraviolet light of wavelength 1800 `A^@` is : (h == 6.6 xx 10^(34) J-s)`

Options

A. 0.15 e V
B. 1.5 e V
C. 15 e V
D. 150 e V

Answer

B