11.When radiation of wavelength 350 nm is incident on a surface, the maximum kinetic energy of the photoelectrons is 1.2 eV.What is the stopping potential for a wavelength of 230 nm?（ h=6.63×10−34 J·s, qe = –1.60×10−19  C, c=3×108 m/s）
(A) 1.65 V
(B) 2.04 V
(C) 2.55 V
(D) 3.05 V
(E) 4.82 V