Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2 is directed at a potassium surface.The maximum kinetic energy of the photoelectrons is()


Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2 is directed at a potassium surface.The maximum kinetic energy of the photoelectrons is()

A.17.6 eV

B.4.42×10-19 J

C.3.5 eV

D.6.9 eV

正确答案:3.5 eV


Tag:原子物理 时间:2024-01-03 15:10:24