4.Suppose you are going to carry out an X-ray experiment using a Cu target and Ni filter.If you want to make the intensity ratio of Ika/IkB=600,what thickness should you use for the Ni filter?The mass absorption coefficient of Ni to Cu-Kg peak is 350cm2/g.For the Cu target,its Iko/lke=5 without a filter.4.Suppose you are going to carry out an X-ray experiment using a Cu target and Ni filter. If you want to make the intensity ratio of IK /IK=600, what thickness should you use for the Ni filter? The mass absorption coefficient of Ni to Cu-K peak is 350cm2 /g. For the Cu target, its IK /IK=5 without a filter. m t e I I −  = 0