8. When a photoelectric surface is illuminated with light of wavelength 537 nm, the stopping potential is measured to be 1.67 V. (h = 6.626 x 10-34 J. s, 1 eV = 1.60 x 10-19 J, e = 1.60 x 10-19 C, melectron = 9.11 x 10-31 kg, h = 6.626 x 10-34 J s) (a) What is the work function of the metal, in eV? (b) What is the maximum speed of the ejected electrons? (c) If the frequency of the illuminating light is changed to 9.98 x 1014 Hz, what will the new stopping potential be measured as?

8. When a photoelectric surface is illuminated with light of wavelength 537 nm, the stopping potential is measured to be 1.67 V. (h = 6.626 x 10-34 J. s, 1 eV = 1.60 x 10-19 J, e = 1.60 x 10-19 C, melectron = 9.11 x 10-31 kg, h = 6.626 x 10-34 J s) (a) What is the work function of the metal, in eV? (b) What is the maximum speed of the ejected electrons? (c) If the frequency of the illuminating light is changed to 9.98 x 1014 Hz, what will the new stopping potential be measured as?