I only had one attempt to ask. So please answer all of them.

Question 1 % % Photons with an energy of 22.3 eV fall on a metal surface with a work function of 3.50 eV. / a] What is the wavelength of the incident photons? {2 marks] bi What type of radiation is this? Is it nut-ray, UV. visible. IR, radio or something else? [1 mark] cl Calculate the maximum kinetic energy of the photoelectrons produced, expressing it in both Joules and electron-volts [3 marks} di What is the maximum speed of the emitted photoelectrons? {2 marks] e] Calculate the de Broglie wavelength of the photoelectrons [2 marks} Question 2 A grating has exactly 6200 slits uniform Iv spaced over 2.2 cm and is illuminated by a monochromatic light source with a wavelength of 530 nm. a] What is the distance cl between the slits? {2 marks) bl At what angles do the second and third order maxima occur? [4 marks} c] The light from the slits is projected onto a screen 1.5 metres away. How far hem til the centre are the maxima described in part lb)? {2 marks] Question 3 A monochromatic light SOurce produces light with frequency 5.00110" Hz and is illuminating a double- slit experiment. In addition, the entire experiment is submerged in water in =1.33i. a] What is the speed of light in water? l2 marks} bi What is the wavelength of the light in water? [2 marks) :1 If the slit separation is d = 5.00::10" m, then at what angles do the three maxima in = O. 1, and 2 occur at? [6 marks}