Question

a) A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus. A stopping voltage of 21 V was obtained. What is the threshold frequency of the metal? (format of a.b x 10^cdHz)

b) Light with a frequency of 5.00 x 10¹⁴ Hz illuminates a photoelectric surface that has a work function of 2.10 x 10^-19 J. What is the maximum kinetic energy of the emitted photoelectrons? (format of a.bc x 10^-de J )

c) Light with a wavelength of 530 nm falls on a photoelectric surface that has a work function of 1.70 eV. What is the maximum kinetic energy (in eV) of any emitted photoelectrons? (3 digit answer)

d) Electrons are ejected from a photoelectric cell with a maximum kinetic energy of 1.20 eV. If the incident light has a wavelength of 410 nm, what is the work function (in eV) of the cell?(3 digit answer)

e) Electrons are ejected from a photoelectric surface with a maximum kinetic energy of 2.9 eV. If the photons of incident light of energy of 3.45 eV, what is the minimum frequency needed to cause photoelectron emission?  (format of a.b x 10^cd Hz)

Answer 1