試題詳解

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, q_e = –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