A rock group called the Viole(n)t Spectroscopists wishes to bathe their stage, which is 8 meters wide, in violet light. The wave length of violet light ranges from 3.800 x

10-7 m to 4.500 x 10-7m. They have a projecting spectrometer which has a diffraction grating which has 5000 slits percm. How far from the isosceles point of the system should the spectrometer be placed?