Created by StemPy LabGraphs of stopping potential against frequency are drawn for two metals. One has a larger work function than the other. Which statement is true?
← All Quizzes
← The threshold frequency of a cathode is 5.2 × 10¹⁴ Hz. A lamp of frequency 9.1 × 10¹⁴ Hz is switched on, and the collector is made negative until the current just stops. How large is the collector voltage? Use h/e = 4.14 × 10⁻¹⁵ V s.A pulse of laser light of wavelength 496 nm carries 4.0 mJ. About how many photons does it hold? Use hc = 1240 eV nm and e = 1.6 × 10⁻¹⁹ C. →
Discussion (0)
Log in to join the discussion.
Loading…