Light of wavelength 525nm passes through a double slit and makes its second maximum (m=2) at an angle of 0.482 deg. What is the separation of the slits, d, IN MILLIMETERS? mm

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct