If w3e fire electrons thru the 2 slit we get an interference pattern showing the wave nature of the electron. Now if we cover one of the slits and fire electrons we get a bar like pattern on the screen. If we cover one slit, fire electrons and use a detector we would also get a bar like formation on the screen. Has any one checked to find if the kinetic energy of the electrons in the last 2 exps. were the same or of different values?Please avoid the use of difficult computations. I had enough trouble with long division.