(a) The work function for chromium metal is 4.37eV. Calculate the frequency of light required to eject electrons with a kinetic energy of 0.74eV. (3 marks) (b) Explain the relationship between the intensity of this light (mentioned in Question 1(a)) and (i) the kinetic energy of the ejected electrons. (ii) the incident energy needed to eject electrons. (iii) the number of electrons ejected