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What is the wavelength (in nm) of an electron with the following kinetic energies? (a) 20. 0 ev (no response) nm (b) 200 ev (no response) nm (c) 2. 00 kev (no response) nm (d) 20. 0 kev (no response) nm (e) 0. 200 mev (no response) nm (f) 2. 00 mev (no response) nm which of these energies are most suited for study of the nacl crystal structure? (select all that apply. ) 20. 0 ev 200 ev 2. 00 kev 20. 0 kev 0. 200 mev 2. 00 mev none of these