Please solve 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 with fully explanation.

11. Light with the wavelength 6.0 x 10" nm strikes a metal having a work function of 2.3 x 1th \"' J. Calculate the may tum kinetic ener , rt jOUlES. of the emitted electrons and the potential difference requrred to stop them. 12 Light wrlh wavelength 4.30 x 10" nm falls onto a photoelectric surface The maximum kinetic energy 01 the photoelectrons is. 1.21 eV Calculate the wort; function of the surface. 13. Calculate the momentum of a 4.10 x. 1t)\"nm photon of violet light. 14. Calculate the energy, in electron volts, required to give an electron an as. de Brogtte wavelength of 7.5 x 10 "l m. 15. An electron is accelerated from rest through a potential difference of 1.50 x 10" V. Calculate Its associated (te Broglie wavelength. 18. An electron is red at a metal target. reaching a speed 01 1 00 x 10'" mts On impact. it rapidly decelerates to hall that speed. emitting a photon in the process. Calculate the wavelength of the photon. 1?. to} Calculate the wavelength of a photon that has the same magnitude of momentum as an electron moving With a speed of 2.52 x 10" mr's. to) Calculate the de Broglie wavelength associated with the electron. 18. Calculate the minimum frequency of the photon required to eject electrons from a metal whose work function is 2.4 eV. Find the threshold frequency for a calcium surface whose work function is 333ml\". 19. Barium has a work function of 2.48 eV. What is the maxtmum ktnetic energy of the ejected electrons it the metal is illuminated at 450 nm? 20. When a certain metal is illuminated at 3.50 x 10" nm. the maximum kinetic energy of the ejected electrons is 1.20 eV. Calculate the work function of the metal. 21. Light of frequency 8.0 x 10'\" H2 illuminates a surface whose work function is 1.2 eV. If the retarding potential is 1.0 V. what ls the maximum speed with which an electron reaches the plate